| Imprinted | 9 |
| Imprinted with acid | 19 |
| Imprinted with indicia | 22 |
| Imprints | 8 |
| Imprints, as in memory | 22 |
| Imprison | 8 |
| Imprisoned | 10 |
| Imprisoned bunny? | 17 |
| Imprisoned Chinese activist and 2010 Nobel Peace Prize winner | 61 |
| Imprisoned Chinese journalist Tao | 33 |
| Imprisoned feline's call? | 29 |
| Imprisoned group of a sort | 26 |
| Imprisoned Peace Nobelist ___ Xiaobo | 36 |
| Imprisoned WorldCom cofounder Bernie | 36 |
| Imprisoners of Charlton Heston in 1968 | 38 |
| Imprisoning officials | 21 |
| Imprisonment | 12 |
| Imprisons | 9 |
| Improbable | 10 |
| Improbable hit | 14 |
| Improbable story | 16 |
| Improbable victories | 20 |
| Improbable victory | 18 |
| Improbable victory, in slang | 28 |
| Improbable win | 14 |
| Improbable, as a story | 22 |
| Improbable, as a tale | 21 |
| Improbable, in a way | 20 |
| Impromp-tu | 10 |
| Impromptu | 9 |
| Impromptu ad | 12 |
| Impromptu bits | 14 |
| Impromptu bookmark | 18 |
| Impromptu coat hanger | 21 |
| Impromptu concert | 17 |
| Impromptu concert in a doorway? | 31 |
| Impromptu concerts | 18 |
| Impromptu flat screwdriver | 26 |
| Impromptu Halloween costume | 27 |
| Impromptu hitching, perhaps (+o) | 32 |
| Impromptu jazz exhibition | 25 |
| Impromptu jazz get-togethers | 28 |
| Impromptu jazz performance | 26 |
| Impromptu jazz sessions | 23 |
| Impromptu musical group | 23 |
| Impromptu musical performance | 29 |
| Impromptu picnic locales | 24 |
| Impromptu screwdriver | 21 |
| Impromptu session with banjo player Scruggs, pianist Hines, and rapper Sweatshirt? | 82 |
| Impromptu, as a committee | 25 |
| Impromptu, as pictures | 22 |
| Impromptu, wide-ranging conversation | 36 |
| Improper | 8 |
| Improper act | 12 |
| Improper application | 20 |
| Improper attire at most golf clubs | 34 |
| Improper behavior | 17 |
| Improper distribution of cards | 30 |
| Improper name for a eucalyptus muncher | 38 |
| Improper practices | 18 |
| Improper sushi implement | 24 |
| Improper trade of a St. Louis N.F.L. player? | 44 |
| Improper way to take the SAT | 28 |
| Improper way to write 59 in Roman numerals | 42 |
| Improper, as influence | 22 |
| Improper, in a way | 18 |
| Improperly | 10 |
| Improperly altered | 18 |
| Improperly failed to follow suit | 32 |
| Improperly install improved computer programs? | 46 |
| Improperly insulated, perhaps | 29 |
| Improperly long sentence | 24 |
| Improperly off base, in brief | 29 |
| Improperly paid for favorable treatment | 39 |
| Improperly passed, as a check | 29 |
| Improperly seize | 16 |
| Improperly: Prefix | 18 |
| Impropriety | 11 |
| Improv bit | 10 |
| Improv club host | 16 |
| Improv comedy troupe members | 28 |
| Improv ending | 13 |
| Improv entertainer | 18 |
| Improv experts | 14 |
| Improv finish? | 14 |
| Improv group | 12 |
| Improv line | 11 |
| Improv music popularized by Ella Fitzgerald | 43 |
| Improv musician's need | 26 |
| Improv of a kind | 16 |
| Improv performance | 18 |
| Improv performer | 16 |
| Improv piece | 12 |
| Improv session | 14 |
| Improv singing | 14 |
| Improv troupe member | 20 |
| Improv troupe members | 21 |
| Improve | 7 |
| Improve a book | 14 |
| Improve a draft | 15 |