| The Oregon Trail crossed it | 27 |
| Locale of Pend Oreille Lake | 27 |
| Ezra Pound's birthplace | 27 |
| Bitterroot Mountains locale | 27 |
| Bear Lake State Park locale | 27 |
| "My guess is ..." | 27 |
| G. & S. princess et al. | 27 |
| Ancient range in Asia Minor | 27 |
| Driver's license, often | 27 |
| Security checkpoint request | 27 |
| Pocket attachment, at times | 27 |
| They're checked at bars | 27 |
| Airport check-in essentials | 27 |
| They may be worn with clips | 27 |
| Suffix with chlor- or sulf- | 27 |
| Suffix for "cyan" | 27 |
| Suffix with fluor- or cyan- | 27 |
| Start of a brilliant scheme | 27 |
| It might be right or bright | 27 |
| Innovator's inspiration | 27 |
| Cartoonist's light bulb | 27 |
| "You have no ___" | 27 |
| "The very _____!" | 27 |
| Result of cerebral activity | 27 |
| Puzzlemaker's beginning | 27 |
| Light bulb, in comic strips | 27 |
| It might pop into your head | 27 |
| Cure for writer's block | 27 |
| Bright one from gray matter | 27 |
| A good one may come to mind | 27 |
| "The very" thing? | 27 |
| ___ man (game-show creator) | 27 |
| Miss America, to Bert Parks | 27 |
| People known to have germs? | 27 |
| They're sometimes funny | 27 |
| They may be funny or bright | 27 |
| Some people have funny ones | 27 |
| Author's notebook items | 27 |
| Auteur's starting point | 27 |
| It comes from a French bean | 27 |
| Extract from a French bean? | 27 |
| "Tête" product | 27 |
| The same, in a bibliography | 27 |
| Ditto, in academic journals | 27 |
| The same, in bibliographies | 27 |
| Alter ___ (exact duplicate) | 27 |
| Kind of G.I. tag, for short | 27 |
| Prefix with gram or logical | 27 |
| Prefix with -gram or -graph | 27 |
| Prefix with -logue or -gram | 27 |
| Prefix for logical or motor | 27 |
| Prefix for graph or logical | 27 |
| Historic assassination date | 27 |
| July 15th for Julius Caesar | 27 |
| Casca's time for action | 27 |
| Caesar's time to beware | 27 |
| ___ of March (ominous date) | 27 |
| "Serves me right" | 27 |
| That is to say, spelled out | 27 |
| In other words, in old Rome | 27 |
| First name in tyranny, once | 27 |
| He overthrew Milton in 1971 | 27 |
| First name in 1970s tyranny | 27 |
| Dictator who idolized Adolf | 27 |
| '-- not know that!' | 27 |
| "Understood, man" | 27 |
| "Loud and clear!" | 27 |
| "Gotcha, daddy-o" | 27 |
| '60s "Gotcha" | 27 |
| "Peculiar" prefix | 27 |
| Tough phrase for foreigners | 27 |
| One concern of a grammarian | 27 |
| Many a long crossword entry | 27 |
| "Eat crow" is one | 27 |
| Translator's challenges | 27 |
| ___-proof (easy to operate) | 27 |
| Dostoyevsky title character | 27 |
| Mensa member's opposite | 27 |
| Monty Python's Eric ___ | 27 |
| Word with gossip or chatter | 27 |
| Gathering dust, so to speak | 27 |
| Auto mechanic's concern | 27 |
| Fabled grasshopper, for one | 27 |
| Slackers and couch potatoes | 27 |
| How fainéants spend time | 27 |
| Words that end bachelorhood | 27 |
| Bachelor's final answer | 27 |
| Words with a familiar ring? | 27 |
| Words in front of the rabbi | 27 |
| Vow before taking the stand | 27 |
| Trial witness's promise | 27 |
| Line that has a ring to it? | 27 |
| It's said before a kiss | 27 |
| Half the title of a musical | 27 |
| Fiancé's last words? | 27 |
| Bride and groom's words | 27 |
| J. Lo's show, for short | 27 |
| Word associated with Cowell | 27 |
| The golden calf, infamously | 27 |
| Hit show on Fox, familiarly | 27 |