| Illegal match play? | 19 |
| Illegal money, maybe | 20 |
| Illegal motion by a pitcher | 27 |
| Illegal mound move | 18 |
| Illegal move at a double yellow line | 36 |
| Illegal moves by CC Sabathia | 28 |
| Illegal moves on a diamond | 26 |
| Illegal nightclub | 17 |
| Illegal occupants | 17 |
| Illegal operation | 17 |
| Illegal parker's concern | 28 |
| Illegal parker's worry | 26 |
| Illegal parkers' worry | 26 |
| Illegal passenger | 17 |
| Illegal payment | 15 |
| Illegal payments | 16 |
| Illegal payoff | 14 |
| Illegal pickoff moves, e.g. | 27 |
| Illegal pitch | 13 |
| Illegal pitch, familiarly | 25 |
| Illegal pitching moves | 22 |
| Illegal plot | 12 |
| Illegal psychostimulant | 23 |
| Illegal race track workers | 26 |
| Illegal record | 14 |
| Illegal saloon offering "complimentary" drinks to those who paid to see an animal curiosity | 101 |
| Illegal scheme | 14 |
| Illegal search and seizure doctrine | 35 |
| Illegal search, in slang | 24 |
| Illegal seizure of acreage | 26 |
| Illegal sellers of tickets | 26 |
| Illegal shift, e.g. | 19 |
| Illegal smoke | 13 |
| Illegal smoke, quaintly | 23 |
| Illegal software-selling ring? | 30 |
| Illegal steroid use, e.g. | 25 |
| Illegal stimulant | 17 |
| Illegal stratum? | 16 |
| Illegal substance for an athlete: Abbr. | 39 |
| Illegal tender | 14 |
| Illegal thing to cook | 21 |
| Illegal thing to drop | 21 |
| Illegal thing to put on a baseball | 34 |
| Illegal ticket sale | 19 |
| Illegal torching | 16 |
| Illegal trader | 14 |
| Illegal trials? | 15 |
| Illegal trickery | 16 |
| Illegal trip across the median strip, perhaps | 45 |
| Illegal turn on a highway | 25 |
| Illegal use of someone else's Visa card? | 44 |
| Illegal USMC status | 19 |
| Illegal voter | 13 |
| Illegal voters | 14 |
| Illegal voyeur | 14 |
| Illegal way to go | 17 |
| Illegal weapon, often | 21 |
| Illegal wrestling hold | 22 |
| Illegal, as a recording | 23 |
| Illegal, in a way | 17 |
| Illegality | 10 |
| Illegalize | 10 |
| Illegalizes | 11 |
| Illegally | 9 |
| Illegally absent from the U.S.A. | 32 |
| Illegally ahead of the football | 31 |
| Illegally ahead of the puck | 27 |
| Illegally captured | 18 |
| Illegally copied | 16 |
| Illegally imported goods | 24 |
| Illegally lend a hand | 21 |
| Illegally made liquor | 21 |
| Illegally obtained | 18 |
| Illegally off base | 18 |
| Illegally off base, briefly | 27 |
| Illegally off-base | 18 |
| Illegally off-base GIs | 22 |
| Illegally overcharge | 20 |
| Illegally reproduce | 19 |
| Illegally reproduce, as software | 32 |
| Illegally seize | 15 |
| Illegally seized | 16 |
| Illegally seizes | 16 |
| Illegally take from | 19 |
| Illegally take, old-style | 25 |
| Illegally transported goods | 27 |
| Illegally try to collect flood insurance? | 41 |
| Illegible handwriting | 21 |
| Illegible handwriting: Fr. | 26 |
| Illegible jotting | 17 |
| Illegible signers | 17 |
| Illegible writing | 17 |
| Illegitimate | 12 |
| Illiberal | 9 |
| Illicit | 7 |
| Illicit affair | 14 |
| Illicit affairs | 15 |
| Illicit amours | 14 |
| Illicit body builder? | 21 |
| Illicit cab | 11 |