| Four-hour tests | 15 |
| Four-in-a-row U.S. Open winner | 30 |
| Four-in-hand | 12 |
| Four-in-hand kin | 16 |
| Four-in-hand strap | 18 |
| Four-in-hand, e.g. | 18 |
| Four-in-hand, for one | 21 |
| Four-in-hands for a polyglot? | 29 |
| Four-in-___ | 11 |
| Four-inch measure | 17 |
| Four-kind connector | 19 |
| Four-leaf clover | 16 |
| Four-leaf clover cousin | 23 |
| Four-leaf clover, for some | 26 |
| Four-leaf find | 14 |
| Four-leaf plant | 15 |
| Four-legged "Born Free" star | 38 |
| Four-legged adoptees | 20 |
| Four-legged Andean | 18 |
| Four-legged bugler | 18 |
| Four-legged charger | 19 |
| Four-legged comfort giver | 25 |
| Four-legged cutter | 18 |
| Four-legged Disney hero | 23 |
| Four-legged Emerald City visitor | 32 |
| Four-legged event? | 18 |
| Four-legged farmyard female | 27 |
| Four-legged father | 18 |
| Four-legged female | 18 |
| Four-legged film star of the '30s | 37 |
| Four-legged film star of the 1930s | 34 |
| Four-legged Francis of film | 27 |
| Four-legged Hammett character | 29 |
| Four-legged herder | 18 |
| Four-legged king | 16 |
| Four-legged leaper | 18 |
| Four-legged mascot in college sports | 36 |
| Four-legged mother | 18 |
| Four-legged newborn | 19 |
| Four-legged nursemaid in "Peter Pan" | 46 |
| Four-legged Oz traveler | 23 |
| Four-legged Oz visitor | 22 |
| Four-legged protector | 21 |
| Four-legged race | 16 |
| Four-legged racer | 17 |
| Four-legged visitor to Oz | 25 |
| Four-letter word | 16 |
| Four-letter word, aptly | 23 |
| Four-letter words | 17 |
| Four-letter words, sometimes | 28 |
| Four-letter-word concealer | 26 |
| Four-letter-word eliminator | 27 |
| Four-line biographical poem | 27 |
| Four-line rhyme scheme | 22 |
| Four-line stanza | 16 |
| Four-line verses | 16 |
| Four-lobed organ | 16 |
| Four-man tanks | 14 |
| Four-minute distance, for some | 30 |
| Four-minute man | 15 |
| Four-minute men | 15 |
| Four-note chord | 15 |
| Four-note piece | 15 |
| Four-o'clock service? | 25 |
| Four-on-the-floor feature | 25 |
| Four-on-the-floor foursome | 26 |
| Four-on-the-floor item | 22 |
| Four-on-the-floor options | 25 |
| Four-on-the-floor, e.g. | 23 |
| Four-page sheet | 15 |
| Four-part harmony part | 22 |
| Four-part part | 14 |
| Four-person outing | 18 |
| Four-person race | 16 |
| Four-person team race | 21 |
| Four-player arcade classic | 26 |
| Four-point H, e.g. | 18 |
| Four-poster | 11 |
| Four-poster and others | 22 |
| Four-poster feature | 19 |
| Four-poster framework | 21 |
| Four-poster top | 15 |
| Four-poster ___ | 15 |
| Four-poster's little brother | 32 |
| Four-poster, e.g. | 17 |
| Four-posters | 12 |
| Four-ring-logo company | 22 |
| Four-ringed import | 18 |
| Four-run blast | 14 |
| Four-run dinger | 15 |
| Four-run four-bagger | 20 |
| Four-run homer | 14 |
| Four-run shot | 13 |
| Four-runner? | 12 |
| Four-seaters, maybe? | 20 |
| Four-sharps key | 15 |
| Four-sided campus space | 23 |
| Four-sided fig. | 15 |
| Four-sided figs. | 16 |
| Four-sided figure | 17 |