| Instant; moment | 15 |
| Instantaneous | 13 |
| Instantaneous web-based communication syst. | 43 |
| Instantaneously | 15 |
| Instanter | 9 |
| Instantly | 9 |
| Instantly ... or how this puzzle's other three longest answers came about? | 78 |
| Instantly fry | 13 |
| Instantly, after "in" | 31 |
| Instantly, for short | 20 |
| Instantly, so it's said | 27 |
| Instants | 8 |
| Instants of revelation, as for puzzle solvers | 45 |
| Instapundit, e.g. | 17 |
| Instead | 7 |
| Instead (of) | 12 |
| Instead of | 10 |
| Instead of: Abbr. | 17 |
| Instep | 6 |
| Instep coverer, at times | 24 |
| Instep covering | 15 |
| Instep crossers | 15 |
| Instep feature | 14 |
| Instep neighbor | 15 |
| Instep shape | 12 |
| Instigate | 9 |
| Instigate litigation | 20 |
| Instigate trouble | 17 |
| Instigate, with "up" | 30 |
| Instigate; urge | 15 |
| Instigated | 10 |
| Instigates | 10 |
| Instigator | 10 |
| Instigator of '70s-'80s wars | 36 |
| Instigator of Balder's death | 32 |
| Instigator of the rape of the Sabines | 37 |
| Instigator's phrase | 23 |
| Instigators | 11 |
| Instill | 7 |
| Instill confidence in | 21 |
| Instill courage into | 20 |
| Instill fear in | 15 |
| Instill with compassion | 23 |
| Instill with life | 17 |
| Instill with the three R's | 30 |
| Instilled deeply | 16 |
| Instiller of confidence | 23 |
| Instilling credence | 19 |
| Instills docility in | 20 |
| Instinct body spray brand | 25 |
| Instinct source | 15 |
| Instinct, with "the" | 30 |
| Instinctive | 11 |
| Instinctive ability | 19 |
| Instinctive desire | 18 |
| Instinctive feeling | 19 |
| Instinctive feeling, slangily | 29 |
| Instinctive impulse | 19 |
| Instinctive motive | 18 |
| Instinctive reaction | 20 |
| Instinctive response | 20 |
| Instinctive, as a feeling | 25 |
| Instinctive, as a reaction | 26 |
| Instincts sometimes indulged | 28 |
| Instinctual | 11 |
| Instinctual desires | 19 |
| Instinctual urge | 16 |
| Instinctual urges | 17 |
| Institute | 9 |
| Institute for Advanced Study locale | 35 |
| Institute for short-order cooks? | 32 |
| Institute founded by Booker T. Washington | 41 |
| Institute in Baltimore | 22 |
| Institute in Brooklyn | 21 |
| Institute in N. Y. | 18 |
| Institute in the 1997 sci-fi film "Contact" | 53 |
| Institute legal proceedings against | 35 |
| Institute of Medicine std. | 26 |
| Institute of Nuclear Studies site | 33 |
| Institute, e.g.: Abbr. | 22 |
| Instituted litigation | 21 |
| Instituted: Abbr. | 17 |
| Institutes legal action | 23 |
| Institutes legal proceedings against | 36 |
| Instituteur hirer | 17 |
| Instituteur's institution | 29 |
| Instituteur's place | 23 |
| Institution at 11 W. 53rd St. in NYC | 36 |
| Institution at Reading | 22 |
| Institution at which this puzzleÂ’s honoree earned a Ph.D. in mathematics | 76 |
| Institution for future instructors | 34 |
| Institution for Shrek and Fiona? | 32 |
| Institution founded by Henry VI | 31 |
| Institution founded by Thos. Jefferson | 38 |
| Institution founded in 1440 | 27 |
| Institution founded in 1701 | 27 |
| Institution in Ithaca, N.Y. | 27 |
| Institution in Philly | 21 |
| Institution located at 11 Wall St. | 34 |
| Institution nicknamed "Coca-Cola University" | 54 |