| Insert cartridges | 17 |
| Insert carets, perhaps | 22 |
| Insert blank pages in a book | 28 |
| Insert blank pages between | 26 |
| Insert a sound track | 20 |
| Insert "@#$%!," say | 29 |
| Insert | 6 |
| Inseparable twosome | 19 |
| Inseparable middle sch. pals, perhaps | 37 |
| Inseparable friends on "Community" | 44 |
| Inseparable friends of legend | 29 |
| Inseparable friends | 19 |
| Inseparable friend | 18 |
| Inseparable companion of Lynceus | 32 |
| Inseparable | 11 |
| Insensitivity | 13 |
| Insensitive; boorish | 20 |
| Insensitive, in modern times | 28 |
| Insensitive, in a way | 21 |
| Insensitive, for short | 22 |
| Insensitive to pain | 19 |
| Insensitive sort | 16 |
| Insensitive jerk | 16 |
| Insensitive fellow | 18 |
| Insensitive bygone Crayola color | 32 |
| Insensitive and coarse | 22 |
| Insensitive | 11 |
| Insensible states | 17 |
| Insensible condition | 20 |
| Insensible | 10 |
| Insemination alternative: Abbr. | 31 |
| Insel, to a Frenchman | 21 |
| Insecurely placed | 17 |
| Insecure? | 9 |
| Insecure vet's admission? | 29 |
| Insecure potential unit? | 24 |
| Insecure feeling | 16 |
| Insecure Brady | 14 |
| Insecure bettors | 16 |
| Insecure | 8 |
| Insects-to-be | 13 |
| Insects, e.g. | 13 |
| Insects' wings | 18 |
| Insects' tongues | 20 |
| Insects' spiracles | 22 |
| Insects' sensory organs | 27 |
| Insects' sensors | 20 |
| Insects' sense organs | 25 |
| Insects' nests | 18 |
| Insects' lower lips | 23 |
| Insects' jaws | 17 |
| Insects' honey tubes | 24 |
| Insects' feelers | 20 |
| Insects' antenna sockets | 28 |
| Insects with stingers | 21 |
| Insects with prominent proboscises | 34 |
| Insects with big stingers | 25 |
| Insects with an olfactory weapon | 32 |
| Insects with "secret lives," per a Sue Monk Kidd title | 64 |
| Insects that walk on water | 26 |
| Insects that have lost their wings | 34 |
| Insects that can become "zombies" via different fungi | 63 |
| Insects related to katydids | 27 |
| Insects on farms | 16 |
| Insects often strained at | 25 |
| Insects not found in Antarctica | 31 |
| Insects in their cocoons | 24 |
| Insects in the woodwork | 23 |
| Insects in the cocoon stage | 27 |
| Insects in swarms | 17 |
| Insects in motion | 17 |
| Insects in final stages | 23 |
| Insects in colonies | 19 |
| Insects in a transformative stage | 33 |
| Insects in a colony | 19 |
| Insects in a biblical plague | 28 |
| Insects hated by fruit farmers | 30 |
| Insects found in trunks | 23 |
| Insects found among the peanut plants in Plains? | 48 |
| Insects for baseballers | 23 |
| Insects course, for short | 25 |
| Insects | 7 |
| Insectivorous songbird | 22 |
| Insectivorous mammal | 20 |
| Insectivorous creature | 22 |
| Insectivorous bird | 18 |
| Insectivore's meal | 22 |
| Insectivore of Madagascar | 25 |
| Insecticides, for short | 23 |
| Insecticides | 12 |
| Insecticide, sort of | 20 |
| Insecticide, for short | 22 |
| Insecticide, e.g. | 17 |
| Insecticide whose spelled-out name has 31 letters | 49 |
| Insecticide victim | 18 |
| Insecticide targets | 19 |
| Insecticide target | 18 |
| Insecticide substance | 21 |
| Insecticide once hawked by Muhammad Ali | 39 |
| Insecticide letters | 19 |