| It's 10 on the modified Mohs scale of hardness | 50 |
| It's about $14 trillion annually, for the U.S. | 50 |
| It's Mongolian for "waterless place" | 50 |
| It helps you when you're going places, briefly | 50 |
| It's "tachin' up" in a 1964 song | 50 |
| Island that the U.S. military covers nearly 30% of | 50 |
| Info request from a computer dating service: Abbr. | 50 |
| It was dissolved during the Napoleonic Wars: Abbr. | 50 |
| Its license plates say "Famous Potatoes" | 50 |
| Isaac Asimov book made into a 2004 Will Smith film | 50 |
| Its anthem is "The Reign of Our Emperor" | 50 |
| Instrument that might make Bird sound like a goose | 50 |
| It might prevent a boxer from getting into a fight | 50 |
| It rhymes with "Chevy" in a classic song | 50 |
| Industrial or computer processing sequence (abbr.) | 50 |
| It's handed down from generation to generation | 50 |
| It lost out to "Patton" for Best Picture | 50 |
| Its first headquarters was called Hitsville U.S.A. | 50 |
| It has six of the seven rainbow colors in its logo | 50 |
| It lobbied for MLK Day to become a federal holiday | 50 |
| In what country are Chinese gooseberries produced? | 50 |
| It's between the British Isles and Scandinavia | 50 |
| It has an "All Songs Considered" podcast | 50 |
| Instrument often described as "mournful" | 50 |
| It's hard to teach one new tricks, so they say | 50 |
| Ian Hunter's "___ Bitten, Twice Shy" | 50 |
| Interjection used for years to market Sasson Jeans | 50 |
| It can precede or follow ''to be'' | 50 |
| It was first performed at Whitehall Palace in 1604 | 50 |
| It might clear things up for a high school student | 50 |
| It can assist in your enjoyment of some psych rock | 50 |
| Indiana town where Cole Porter was born and buried | 50 |
| It may say ''Wish you were here!'' | 50 |
| It's periodically observed in Hollywood: Abbr. | 50 |
| Item sported to support Britain's Comic Relief | 50 |
| It's glossy for a tailor but not for a painter | 50 |
| Instrument with a solo during "Maneater" | 50 |
| It may lead to a term ending with "gate" | 50 |
| It's where "EastEnders" can be found | 50 |
| Institutions where ax-wielder Lizzie got educated? | 50 |
| It's white, puffy, and looks good in a kitchen | 50 |
| It might be answered "Muy bien, gracias" | 50 |
| It's far from "a little off the top" | 50 |
| Initials among crooked bankers about to get busted | 50 |
| Industrialist Eaton and hockeyist Denneny, to pals | 50 |
| It's worth three fewer points than a touchdown | 50 |
| Important post-contact parts of strokes and serves | 50 |
| Irish golfer who won the Open Championship in 1947 | 50 |
| Italian Baroque painter known for ceiling frescoes | 50 |
| I __ him about never playing Ping-Pong with me ... | 50 |
| Indignant reply to a request for free sock repair? | 50 |
| It helps determine how much tax you owe the I.R.S. | 50 |
| Irish writer who coined the word "quark" | 50 |
| In full, carpentry tool slipped into a gap (2,1,5) | 50 |
| International conference site in Switzerland, 1925 | 50 |
| Ilsa __, Bergman's "Casablanca" role | 50 |
| Italian town where Napoleon defeated the Austrians | 50 |
| Irritating "Grey's Anatomy" nickname | 50 |
| Important key (and key to this puzzle's theme) | 50 |
| In other words, mom or dad will have to operate it | 50 |
| It typically involves repetitive behavior, briefly | 50 |
| It begins "A well regulated Militia ..." | 50 |
| Item claimed to hold 12 times its weight in liquid | 50 |
| It's usually not needed with an electric razor | 50 |
| It prompted a flood of "Psycho" analysis | 50 |
| It's off the main drag (and two kinds of cars) | 50 |
| Instrument played on "Sgt. Pepper's" | 50 |
| Instrument often played while sitting on the floor | 50 |
| It might bring you to the verge of a steep decline | 50 |
| It may read "Add 2-3 inches in 3 weeks!" | 50 |
| Impatient leprechaun's concern on an airplane? | 50 |
| It means "resplendent land" in Sinhalese | 50 |
| It's been out of commission since 2003 (abbr.) | 50 |
| In K.C. it's black and white and read all over | 50 |
| It's associated with some magnets and magnates | 50 |
| In which "journey" is "safari" | 50 |
| Item seen on the 30-yard line when the game starts | 50 |
| It comes "after me," in a Louis XV quote | 50 |
| It may be abbreviated "H," on a calendar | 50 |
| Iron Maiden's "Hallowed Be ___ Name" | 50 |
| It fell on Neil Armstrong in the summer of '69 | 50 |
| It'll reach maturity in no more than ten years | 50 |
| Its name means ''Eastern capital'' | 50 |
| It might need two hands to be removed from a shelf | 50 |
| It's carried across the globe every four years | 50 |
| Its common extensions are the theme of this puzzle | 50 |
| It published its first issue on September 15, 1982 | 50 |
| Its alma mater is "Blue and Gold": Abbr. | 50 |
| It's known as the Ship With the Mighty Stinger | 50 |
| Its subtitle is "A Novel Without a Hero" | 50 |
| Iconic Pink Floyd album/tour, with "The" | 50 |
| In a ___, there's lots of ___ in the machinery | 50 |
| I always thought he'd __ out on me in fear ... | 50 |
| It was originally produced to preserve excess milk | 50 |
| Impersonator in "Little Red Riding Hood" | 50 |
| Instruments played at theaters during silent films | 50 |
| Indie rock's Someone Still Loves You Boris ___ | 50 |
| Informal contraction equivalent to "see" | 50 |
| It has the same meaning if "cap" is added | 51 |
| Indian city with a major UNESCO World Heritage Site | 51 |