| Ones abroad | 11 |
| Ones above military heads | 25 |
| Ones a mother hen mothers | 25 |
| Ones "over there" | 27 |
| Ones "at law": Abbr. | 30 |
| Ones | 4 |
| Oners at Wimbledon | 18 |
| Oners | 5 |
| Onerous weight | 14 |
| Onerous task | 12 |
| Onerous duty | 12 |
| Onerous concern | 15 |
| Onerous | 7 |
| OneRepublic: "___ and Stare" | 38 |
| OneRepublic hit | 15 |
| OneRepublic "___ and Stare" | 37 |
| OneRepublic "All We ___" | 34 |
| Oner | 4 |
| Oneness, in Udine | 17 |
| Oneness of opinion | 18 |
| Oneness | 7 |
| Onelinedrawing song that sticks to the facts? | 45 |
| Oneirocritics' field | 24 |
| Oneiric image | 13 |
| Oneidas, Senecas, et al. | 24 |
| Oneida's county seat | 24 |
| Oneida Community founder | 24 |
| Oneida Co. city | 15 |
| Oned | 4 |
| One? | 4 |
| One: Sp. | 8 |
| One: Scots | 10 |
| One: Scot. | 10 |
| One: Scot | 9 |
| One: Prefix | 11 |
| One: Pref. | 10 |
| One: Lat. | 9 |
| One: Ger. | 9 |
| One: Fr. | 8 |
| One: Comb. form | 15 |
| One: Br. dialect | 16 |
| One/time link | 13 |
| One-_____ (ball game) | 21 |
| One-_____ | 9 |
| One-___, children's game | 28 |
| One-___ vitamins | 16 |
| One-___ victory (rout) | 22 |
| One-___ jacks | 13 |
| One-___ chance | 14 |
| One-___ bandit | 14 |
| One-___ (superior to) | 21 |
| One-___ (short play) | 20 |
| One-___ (short film) | 20 |
| One-___ (old ball game) | 23 |
| One-___ (like a cyclops) | 24 |
| One-___ (kids' game) | 24 |
| One-___ (kid's game) | 24 |
| One-___ (brief joke) | 20 |
| One-___ (ball game) | 19 |
| One-___ | 7 |
| One-__: uninterrupted play | 26 |
| One-__: biased | 14 |
| One-__: ball game | 17 |
| One-__ (teacher's quaint workplace) | 39 |
| One-__ (biased) | 15 |
| One-year-old, usually | 21 |
| One-year-old sheep | 18 |
| One-year record | 15 |
| One-year prison term, in slang | 30 |
| One-year plants | 15 |
| One-word question from Miss Piggy | 33 |
| One-word question | 17 |
| One-word query | 14 |
| One-word defs. | 14 |
| One-word def. | 13 |
| One-word Built to Spill song | 28 |
| One-word bird? | 14 |
| One-word bird in a poem | 23 |
| One-word advice to the Graduate | 31 |
| One-word advice | 15 |
| One-wheeled vehicles | 20 |
| One-wd. definition, essentially | 31 |
| One-wd. definition | 18 |
| One-way-traffic enforcer, often | 31 |
| One-way transports? | 19 |
| One-way transports | 18 |
| One-way transporters | 20 |
| One-way symbol | 14 |
| One-way street sign symbol | 26 |
| One-way street sign | 19 |
| One-way street no-nos | 21 |
| One-way street no-no | 20 |
| One-way sign shape | 18 |
| One-way sign | 12 |
| One-way indicator | 17 |
| One-way flights? | 16 |
| One-volume works of Shakespeare, e.g. | 37 |
| One-volume encyclopedia range | 29 |
| One-ups a card | 14 |
| One-ups | 7 |