| Onelinedrawing song that sticks to the facts? | 45 |
| Oneness | 7 |
| Oneness of opinion | 18 |
| Oneness, in Udine | 17 |
| Oner | 4 |
| OneRepublic "All We ___" | 34 |
| OneRepublic "___ and Stare" | 37 |
| OneRepublic hit | 15 |
| OneRepublic: "___ and Stare" | 38 |
| Onerous | 7 |
| Onerous concern | 15 |
| Onerous duty | 12 |
| Onerous task | 12 |
| Onerous weight | 14 |
| Oners | 5 |
| Oners at Wimbledon | 18 |
| Ones | 4 |
| Ones "at law": Abbr. | 30 |
| Ones "over there" | 27 |
| Ones a mother hen mothers | 25 |
| Ones above military heads | 25 |
| Ones abroad | 11 |
| Ones accused: Abbr. | 19 |
| Ones acting badly | 17 |
| Ones added to the payroll | 25 |
| Ones administering CPR, often | 29 |
| Ones against alcohol | 20 |
| Ones against us | 15 |
| Ones among the coop populace | 28 |
| Ones arguing about diamonds: Abbr. | 34 |
| Ones associated with wheels and deals | 37 |
| Ones at hand | 12 |
| Ones at home on the range? | 26 |
| Ones at the feeding trough | 26 |
| Ones at the gate, maybe | 23 |
| Ones at the helm, essentially | 29 |
| Ones at the pole positions? | 27 |
| Ones at the top of the corporate ladder | 39 |
| Ones at the top of their business? | 34 |
| Ones attracted to flames | 24 |
| Ones banned from their homes | 28 |
| Ones bearing Valentine's gifts, e.g. | 40 |
| Ones before whom pearls are cast | 32 |
| Ones being grilled, maybe | 25 |
| Ones being honored | 18 |
| Ones being shot at | 18 |
| Ones being taught | 17 |
| Ones being tested | 17 |
| Ones bet on by bettors | 22 |
| Ones beyond the pale? | 21 |
| Ones biased against the elderly | 31 |
| Ones blowing in the wind | 24 |
| Ones born before Virgos | 23 |
| Ones born in late July | 22 |
| Ones bound by blood | 19 |
| Ones breaking away | 18 |
| Ones breaking up clods | 22 |
| Ones brought in to negotiate parts of contracts | 47 |
| Ones browsing the Web | 21 |
| Ones called to an accident, briefly | 35 |
| Ones calling the shots?: Abbr. | 30 |
| Ones carrying an apostle? | 25 |
| Ones cast in "Wicked" | 31 |
| Ones caught in a maze? | 22 |
| Ones changing locks | 19 |
| Ones charging reading fees? | 27 |
| Ones clad in blue | 17 |
| Ones clearing out? | 18 |
| Ones close to le coeur | 22 |
| Ones close to the heart? | 24 |
| Ones closely packed in | 22 |
| Ones coming from the Arc de Triomphe? | 37 |
| Ones coming into view | 21 |
| Ones coming on board | 20 |
| Ones concealing their aims | 26 |
| Ones concerned with color | 25 |
| Ones concerned with custody | 27 |
| Ones concerned with sustainable design | 38 |
| Ones copying from Dictaphones | 29 |
| Ones creating a lot of buzz in the music industry? | 50 |
| Ones crunched during crunch time? | 33 |
| Ones crying foul | 16 |
| Ones cutting in line, e.g. | 26 |
| Ones dealing in futures? | 24 |
| Ones deeply involved in opera? | 30 |
| Ones doing a balancing job? | 27 |
| Ones doing aerobics | 19 |
| Ones doing art finishing | 24 |
| Ones doing case studies | 23 |
| Ones doing hatchet jobs? | 24 |
| Ones doing lab exams? | 21 |
| Ones doing push-ups? | 20 |
| Ones doing rush work? | 21 |
| Ones doing tests: Abbr. | 23 |
| Ones doing the splits? | 22 |
| Ones doormen recognize | 22 |
| Ones drawn to film? | 19 |
| Ones drawn to flames, briefly | 29 |
| Ones drawn to scale? | 20 |
| Ones dressed in black | 21 |