| Impetus for some foolish behavior | 33 |
| Impetus to review safety procedures | 35 |
| Impetuses for some outrageous acts | 34 |
| Implement for a confident crossword solver | 42 |
| Implement for an experienced crossword solver | 45 |
| Implement for checking the doneness of a steak? | 47 |
| Implement made of flexible, tufted wire | 39 |
| Implement with a serrated front edge | 36 |
| Implement with a spatulalike blade | 34 |
| Implements for "seven maids" | 38 |
| Implied rather than expressed openly | 36 |
| Implored (with "with") | 32 |
| Imply, with ''to'' | 34 |
| Impolite ''goodbye'' | 36 |
| Impolite thing to do with a party chip | 38 |
| Import replaced by the Echo in 2000 | 35 |
| Import with a "cavallino rampante" logo | 49 |
| Important 1960 event for Broncos fans? | 38 |
| Important archeological discovery: 1799 | 39 |
| Important business to many states | 33 |
| Important Canadian livestock feed | 33 |
| Important caviar source, with "the" | 45 |
| Important college football games | 32 |
| Important computer industry port | 32 |
| Important considerations in Cy Young Award voting | 49 |
| Important constituent of igneous rocks | 38 |
| Important digestive acid, chemically | 36 |
| Important digits on an I.R.S. form | 34 |
| Important drive in Freudian theory | 34 |
| Important energy source for the brain | 37 |
| Important exam for college hopefuls | 35 |
| Important first step, metaphorically | 36 |
| Important fortress in the Crusades | 34 |
| Important group in cell metabolism | 34 |
| Important info for making connections | 37 |
| Important info for people with connections | 42 |
| Important ingredient in DNA repair | 34 |
| Important joint for a field goal kicker | 39 |
| Important means of communing with Jah | 37 |
| Important meeting for Domingo and colleagues? | 45 |
| Important name in Chinese history | 33 |
| Important name in Virginia history | 34 |
| Important no. to most car buyers | 32 |
| Important number on Downing Street | 34 |
| Important part of a slide projector | 35 |
| Important part of some proposals | 32 |
| Important parts of reference books | 34 |
| Important parts of Thanksgiving and Easter | 42 |
| Important parts of the body's defense system | 48 |
| Important peninsula in the Six-Day War, 1967 | 44 |
| Important percentage for leadoff hitters | 40 |
| Important plant in alternative medicine | 39 |
| Important quality in products for toddlers | 42 |
| Important role for the federal government | 41 |
| Important role in "Our Town" | 38 |
| Important score for Tiger Woods? | 32 |
| Important seven-day TV ratings period | 37 |
| Important shipping route opened in 1914 | 39 |
| Important sign in a crowded venue | 33 |
| Important source of commissions: Abbr. | 38 |
| Important stat to a pitching coach | 34 |
| Important substance in immune development | 41 |
| Important tool in insider trading | 33 |
| Imported Portuguese dessert wine? | 33 |
| Imposed on others' generosity | 33 |
| Imposer of a drunk's comeuppance | 36 |
| Imposing a general liability, legally | 37 |
| Imposing look from an angry king? | 33 |
| Imposing monetary penalties with a nice Chianti? | 48 |
| Imposing Wimbledon presence in the '80s-90s | 47 |
| Imposition on drinking with recycling? | 38 |
| Impossibility if you keep your mouth shut | 41 |
| Impossible Missions Force leader | 32 |
| Impossible Missions Force leader Jim | 36 |
| Impossible number in a football score | 37 |
| Impossible point total in American pro football | 47 |
| Impossible score, in U.S. football | 34 |
| Impossible, and hint to this puzzle's theme | 47 |
| Impossible, like an upset victory | 33 |
| Impossibles song "Erin With ___" | 42 |
| Imposter pretending to be from Manama? | 38 |
| Impractical wrinkle smoother [CALIFORNIA] | 41 |
| Impresario Hurok: 1888–1974 | 34 |
| Impresario's production, perhaps | 36 |
| Impression obtained by the senses | 33 |
| Impression taken at a crime scene | 33 |
| Impressionist composition of 1905 | 33 |
| Impressionist Edgar who painted ballerinas | 42 |
| Impressionist painter Childe ___ | 32 |
| Impressionist painter of "The Bathers" | 48 |
| Impressionist painter of ballerinas | 35 |
| Impressionist painter: 1834–1917 | 39 |
| Impressionist's study of a washerwoman? | 43 |
| Impressions left at parking lots | 32 |
| Impressive way to solve a puzzle | 32 |
| Impressive, as a speech or performance | 38 |
| Impressive, though lacking substance | 36 |
| Imprint of Holtzbrinck publishers | 33 |
| Imprisoned Chinese journalist Tao | 33 |
| Imprisoned Peace Nobelist ___ Xiaobo | 36 |