| One at a loss for words? | 24 |
| One at a keyboard, often | 24 |
| One at a keyboard | 17 |
| One at a homecoming | 19 |
| One at a hoedown | 16 |
| One at a dull meeting, perhaps | 30 |
| One at a Delhi counter, say | 27 |
| One at a crime scene | 20 |
| One at a crash site, for short | 30 |
| One at a checkout | 17 |
| One at a brayer meeting? | 24 |
| One at a ball | 13 |
| One at -- | 9 |
| One associated with honesty | 27 |
| One associated with fire | 24 |
| One assigning work | 18 |
| One assigned to a bomb? | 23 |
| One asserting something | 23 |
| One assaulting a sorceress? | 27 |
| One aspirin | 11 |
| One aspect of earthquake study | 30 |
| One asking you to rinse: Abbr. | 30 |
| One asking questions he already knows the answers to | 52 |
| One asking questions | 20 |
| One asking for more Money | 25 |
| One asking for a handout | 24 |
| One asking a lot of questions | 29 |
| One asked to R.S.V.P. | 21 |
| One ascending Pikes Peak | 24 |
| One arriving during the overture, say | 37 |
| One arranging things in large categories | 40 |
| One armed bandit | 16 |
| One area of corporate law | 25 |
| One apt to have an appt. app | 28 |
| One approaching senility | 24 |
| One approaching middle age | 26 |
| One approaching a hearse | 24 |
| One approaching 100 | 19 |
| One appointed by God, to believers | 34 |
| One applied to a grindstone | 27 |
| One applauded for a bit | 23 |
| One appears on the Australian Coat of Arms | 42 |
| One appearing between numbers | 29 |
| One appealing to a meter reader? | 32 |
| One answering questions | 23 |
| One answer to an age-old question | 33 |
| One answer to "How are you?" | 38 |
| One answer to "Are you waiting for someone?" | 54 |
| One answer to ''Wanna?'' | 40 |
| One answer to ''Should we?'' | 44 |
| One annoyingly proper | 21 |
| One ankle-deep in socks? | 24 |
| One ankle-deep in shoes? | 24 |
| One angling for dinner? | 23 |
| One and _____ | 13 |
| One and ___ | 11 |
| One and __: soul mate | 21 |
| One and __ | 10 |
| One and three | 13 |
| One and the same | 16 |
| One and the other | 17 |
| One and only? | 13 |
| One and only, in romance | 24 |
| One and only member | 19 |
| One and only | 12 |
| One and one-third drams: Abbr. | 30 |
| One and one, side-by-side | 25 |
| One and one together? | 21 |
| One and one | 11 |
| One and all | 11 |
| One and a half: Comb. form | 26 |
| One among the woodwinds | 23 |
| One among the nightingales, in a poem | 37 |
| One among the moguls | 20 |
| One amok | 8 |
| One always working out | 22 |
| One always talking about his MacBook Air? | 41 |
| One always taking shots? | 24 |
| One always sticking its nose in things | 38 |
| One always snacking | 19 |
| One always seen in Häagen-Dazs? | 34 |
| One always seeing the glass half full | 37 |
| One always on the move | 22 |
| One always on the lookout for a deal | 36 |
| One always on the go | 20 |
| One always in search of himself | 31 |
| One always hoping to score | 26 |
| One alternative from Howie Mandel | 33 |
| One along an autobahn? | 22 |
| One allocating tasks, e.g. | 26 |
| One all, say | 12 |
| One alarmed in the morning? | 27 |
| One akin to a Directioner, Selenator, or Swifty | 47 |
| One airing grievances | 21 |
| One aiming at clay pigeons | 26 |
| One aiding in wrongdoing | 24 |
| One aiding | 10 |
| One aided by Nader | 18 |
| One ahead of a bishop | 21 |
| One against the odds | 20 |