| 100% | IFI | 3 | "___ Only Had a Brain" |
| 87% | DOROTHY | 7 | Character who sings with the Scarecrow in "If I Only Had a Brain" |
| 86% | IFI | 3 | "___ Only Had a Brain" (the Scarecrow's song in "The Wizard of Oz"): 2 wds. |
| 67% | HALO | 4 | Harold only has a saintly sign |
| 66% | STARFISH | 8 | This animal does not have a brain |
| 65% | SCARECROW | 9 | Baum character who didn't have a brain |
| 64% | MYTH | 4 | "Goldfish only have a three-second memory," for instance |
| 63% | ONLY | 4 | "If I ___ Had a Brain" ("The Wizard of Oz" song) |
| 61% | EYE | 3 | A cyclops has only one |
| 61% | {DIME}NSION | 11 | A line has only one |
| 60% | ORION | 5 | What has a "belt" seen only at night |
| 60% | EAR | 3 | A praying mantis has only one |
| 59% | MELODICALLYSUPERVISED | 21 | Having a boss who will only communicate with you by singing? |
| 58% | BUS | 3 | Vehicle that might have a farebox saying EXACT CHANGE ONLY |
| 57% | LOWRISEBUILDING | 15 | It has only a few stories |
| 57% | NOUN | 4 | Devout woman has only a term |
| 56% | MONOPHONY | 9 | Music having only a single melodic line |
| 56% | RUSSIANROULETTE | 15 | Game that has only a single round |
| 56% | MAINE | 5 | Only state with a name that has only one syllable |
| 55% | ISSUANT | 7 | Having only the upper part showing, as a heraldic beast |
| 55% | ISSUANT | 7 | Having only the forepart visible, as a beast in heraldry |
| 55% | EAR | 3 | Something a mantis has only one of, surprisingly |
| 55% | CLUEMONOPOLY | 12 | What the only detective on a case has? |
| 55% | WORSETOCOME | 11 | Prognosis that a problem has only just begun |
| 54% | STATESEAL | 9 | Idaho has the only one designed by a woman |
| 52% | EAR | 3 | A mantis is the only animal known to have just one of these |
| 52% | MARINERS | 8 | Only M.L.B. team never to have played in a World Series |
| 52% | INNKEEPER | 9 | He had no room for Mary and Joseph, only a stable |
| 52% | EYES | 4 | A cyclops only has one of these, while humans have two |
| 52% | LONDONBRIDGE | 12 | Subject of a nursery rhyme that has only eight different words |