| Improper practices | 18 |
| Improper name for a eucalyptus muncher | 38 |
| Improper distribution of cards | 30 |
| Improper behavior | 17 |
| Improper attire at most golf clubs | 34 |
| Improper application | 20 |
| Improper act | 12 |
| Improper | 8 |
| Impromptu, wide-ranging conversation | 36 |
| Impromptu, as pictures | 22 |
| Impromptu, as a committee | 25 |
| Impromptu session with banjo player Scruggs, pianist Hines, and rapper Sweatshirt? | 82 |
| Impromptu screwdriver | 21 |
| Impromptu picnic locales | 24 |
| Impromptu musical performance | 29 |
| Impromptu musical group | 23 |
| Impromptu jazz sessions | 23 |
| Impromptu jazz performance | 26 |
| Impromptu jazz get-togethers | 28 |
| Impromptu jazz exhibition | 25 |
| Impromptu hitching, perhaps (+o) | 32 |
| Impromptu Halloween costume | 27 |
| Impromptu flat screwdriver | 26 |
| Impromptu concerts | 18 |
| Impromptu concert in a doorway? | 31 |
| Impromptu concert | 17 |
| Impromptu coat hanger | 21 |
| Impromptu bookmark | 18 |
| Impromptu bits | 14 |
| Impromptu ad | 12 |
| Impromptu | 9 |
| Impromp-tu | 10 |
| Improbable, in a way | 20 |
| Improbable, as a tale | 21 |
| Improbable, as a story | 22 |
| Improbable win | 14 |
| Improbable victory, in slang | 28 |
| Improbable victory | 18 |
| Improbable victories | 20 |
| Improbable story | 16 |
| Improbable hit | 14 |
| Improbable | 10 |
| Imprisons | 9 |
| Imprisonment | 12 |
| Imprisoning officials | 21 |
| Imprisoners of Charlton Heston in 1968 | 38 |
| Imprisoned WorldCom cofounder Bernie | 36 |
| Imprisoned Peace Nobelist ___ Xiaobo | 36 |
| Imprisoned group of a sort | 26 |
| Imprisoned feline's call? | 29 |
| Imprisoned Chinese journalist Tao | 33 |
| Imprisoned Chinese activist and 2010 Nobel Peace Prize winner | 61 |
| Imprisoned bunny? | 17 |
| Imprisoned | 10 |
| Imprison | 8 |
| Imprints, as in memory | 22 |
| Imprints | 8 |
| Imprinted with indicia | 22 |
| Imprinted with acid | 19 |
| Imprinted | 9 |
| Imprint: Sp. | 12 |
| Imprint, as in the memory | 25 |
| Imprint permanently | 19 |
| Imprint on glass | 16 |
| Imprint on a hard surface | 25 |
| Imprint of Holtzbrinck publishers | 33 |
| Imprint of HarperCollins | 24 |
| Imprint in one's mind | 25 |
| Imprint firmly | 14 |
| Imprint clearly | 15 |
| Imprint | 7 |
| Imprimeur's need | 20 |
| Imprimatur | 10 |
| Impreza's make | 18 |
| Impreza maker | 13 |
| Impreza automaker | 17 |
| Imprest | 7 |
| Impressively large | 18 |
| Impressively high | 17 |
| Impressively great | 18 |
| Impressively done | 21 |
| Impressively direct | 19 |
| Impressive, to teens | 20 |
| Impressive, to surfers | 22 |
| Impressive, though lacking substance | 36 |
| Impressive, so to speak | 23 |
| Impressive, as accommodations | 29 |
| Impressive, as a speech or performance | 38 |
| Impressive work | 15 |
| Impressive way to walk? | 23 |
| Impressive way to solve a puzzle | 32 |
| Impressive way to go out | 24 |
| Impressive variety | 18 |
| Impressive turnout | 18 |
| Impressive tee shot | 19 |
| Impressive style | 16 |
| Impressive stuff | 16 |
| Impressive spread | 17 |
| Impressive six-pack | 19 |
| Impressive show | 15 |