| Insects that walk on water | 26 |
| Insects with "secret lives," per a Sue Monk Kidd title | 64 |
| Insects with an olfactory weapon | 32 |
| Insects with big stingers | 25 |
| Insects with prominent proboscises | 34 |
| Insects with stingers | 21 |
| Insects' antenna sockets | 28 |
| Insects' feelers | 20 |
| Insects' honey tubes | 24 |
| Insects' jaws | 17 |
| Insects' lower lips | 23 |
| Insects' nests | 18 |
| Insects' sense organs | 25 |
| Insects' sensors | 20 |
| Insects' sensory organs | 27 |
| Insects' spiracles | 22 |
| Insects' tongues | 20 |
| Insects' wings | 18 |
| Insects, e.g. | 13 |
| Insects-to-be | 13 |
| Insecure | 8 |
| Insecure bettors | 16 |
| Insecure Brady | 14 |
| Insecure feeling | 16 |
| Insecure potential unit? | 24 |
| Insecure vet's admission? | 29 |
| Insecure? | 9 |
| Insecurely placed | 17 |
| Insel, to a Frenchman | 21 |
| Insemination alternative: Abbr. | 31 |
| Insensible | 10 |
| Insensible condition | 20 |
| Insensible states | 17 |
| Insensitive | 11 |
| Insensitive and coarse | 22 |
| Insensitive bygone Crayola color | 32 |
| Insensitive fellow | 18 |
| Insensitive jerk | 16 |
| Insensitive sort | 16 |
| Insensitive to pain | 19 |
| Insensitive, for short | 22 |
| Insensitive, in a way | 21 |
| Insensitive, in modern times | 28 |
| Insensitive; boorish | 20 |
| Insensitivity | 13 |
| Inseparable | 11 |
| Inseparable companion of Lynceus | 32 |
| Inseparable friend | 18 |
| Inseparable friends | 19 |
| Inseparable friends of legend | 29 |
| Inseparable friends on "Community" | 44 |
| Inseparable middle sch. pals, perhaps | 37 |
| Inseparable twosome | 19 |
| Insert | 6 |
| Insert "@#$%!," say | 29 |
| Insert a sound track | 20 |
| Insert blank pages between | 26 |
| Insert blank pages in a book | 28 |
| Insert carets, perhaps | 22 |
| Insert cartridges | 17 |
| Insert cartridges again | 23 |
| Insert casually | 15 |
| Insert coins in, as a parking meter | 35 |
| Insert film into a camera | 25 |
| Insert firmly | 13 |
| Insert for a Selectric | 22 |
| Insert for some cameras | 23 |
| Insert for some old cameras | 27 |
| Insert forcefully | 17 |
| Insert fresh ammo | 17 |
| Insert fresh cartridges | 23 |
| Insert fresh film | 17 |
| Insert in a plant | 17 |
| Insert in a tape recorder | 25 |
| Insert in the game | 18 |
| Insert mark | 11 |
| Insert marker | 13 |
| Insert marks | 12 |
| Insert more ammo | 16 |
| Insert more rounds | 18 |
| Insert sign | 11 |
| Insert surreptitiously | 22 |
| Insert, as a code | 17 |
| Insert, as into a tight schedule | 32 |
| Insert: Abbr. | 13 |
| Inserted | 8 |
| Inserted a rider | 16 |
| Inserted bud | 12 |
| Inserted covertly | 17 |
| Inserted, in a way | 18 |
| Insertion in an operation | 25 |
| Insertion indication | 20 |
| Insertion indicator | 19 |
| Insertion into a deck | 21 |
| Insertion into an old deck | 26 |
| Insertion mark | 14 |
| Insertion marks | 15 |
| Insertion point indicator | 25 |
| Insertion sign | 14 |
| Insertion signal | 16 |