| Illness of unknown origin | 25 |
| Illness caused by plasmodia | 27 |
| Illiterates' signatures | 27 |
| Illiterates' marks | 22 |
| Illiterate signatory, perhaps | 29 |
| Illinoisan in the news | 22 |
| Illinois-based food giant | 25 |
| Illinois-based brewery | 22 |
| Illinois, Wisconsin, etc. | 25 |
| Illinois's nickname | 23 |
| Illinois's junior senator | 29 |
| Illinois town near Champaign | 28 |
| Illinois test-marketing town | 28 |
| Illinois senator Obama | 22 |
| Illinois senator Barack __ | 26 |
| Illinois senator Barack | 23 |
| Illinois rockers Sleeping ___ | 29 |
| Illinois or Indiana city | 24 |
| Illinois or Colorado city | 25 |
| Illinois neighbor: Abbr. | 24 |
| Illinois junior senator | 23 |
| Illinois home of Caterpillar | 28 |
| Illinois governor Blagojevich | 29 |
| Illinois emo hair band? | 23 |
| Illinois county or its seat | 27 |
| Illinois clock setting | 22 |
| Illinois city, for short | 24 |
| Illinois city or county | 23 |
| Illinois city near St.Louis | 27 |
| Illinois city near St. Louis | 28 |
| Illinois border sharer | 22 |
| Illicitly gained goods | 22 |
| Illicitly distilled whiskey | 27 |
| Illicitly distilled liquor | 26 |
| Illicit-spirits dealer | 22 |
| Illicit use of authority | 24 |
| Illicit stimulant, for short | 28 |
| Illicit smoke, slangily | 23 |
| Illicit rendezvous locale | 25 |
| Illicit liquor, colloquially | 28 |
| Illicit gambling, drugs, etc. | 29 |
| Illicit drugs, briefly | 22 |
| Illegible handwriting: Fr. | 26 |
| Illegally transported goods | 27 |
| Illegally take, old-style | 25 |
| Illegally off-base GIs | 22 |
| Illegally off base, briefly | 27 |
| Illegally imported goods | 24 |
| Illegally ahead of the puck | 27 |
| Illegal, as a recording | 23 |
| Illegal wrestling hold | 22 |
| Illegal turn on a highway | 25 |
| Illegal steroid use, e.g. | 25 |
| Illegal smoke, quaintly | 23 |
| Illegal sellers of tickets | 26 |
| Illegal seizure of acreage | 26 |
| Illegal search, in slang | 24 |
| Illegal race track workers | 26 |
| Illegal psychostimulant | 23 |
| Illegal pitching moves | 22 |
| Illegal pitch, familiarly | 25 |
| Illegal pickoff moves, e.g. | 27 |
| Illegal parkers' worry | 26 |
| Illegal parker's worry | 26 |
| Illegal parker's concern | 28 |
| Illegal moves on a diamond | 26 |
| Illegal moves by CC Sabathia | 28 |
| Illegal motion by a pitcher | 27 |
| Illegal lover, slangily | 23 |
| Illegal lending tactic | 22 |
| Illegal lending practices | 25 |
| Illegal lending practice | 24 |
| Illegal kind of punishment | 26 |
| Illegal investment scheme | 25 |
| Illegal hunters seek it | 23 |
| Illegal hunter or fisherman | 27 |
| Illegal hiring practice | 23 |
| Illegal highway maneuvers | 25 |
| Illegal highway maneuver | 24 |
| Illegal gridiron block | 22 |
| Illegal gambling, to some | 25 |
| Illegal freeway maneuver | 24 |
| Illegal football tackle | 23 |
| Illegal football plays | 22 |
| Illegal football block | 22 |
| Illegal drug, informally | 24 |
| Illegal diamond delivery | 24 |
| Illegal copies of goods | 23 |
| Illegal claimant to a throne | 28 |
| Illegal cigarettes, slangily | 28 |
| Illegal charades clues | 22 |
| Illegal border crosser | 22 |
| Illegal block on the gridiron | 29 |
| Illegal block in football | 25 |
| Illegal baseball pitches | 24 |
| Illegal bank practices | 22 |
| Illegal access, in perp-speak | 29 |
| Illegal "acid" | 24 |
| Ill-___ (acquired improperly) | 29 |
| Ill-trained dog, perhaps | 24 |