| Oncle's counterpart | 23 |
| Oncle's mate | 16 |
| Oncle's partner | 19 |
| Oncle's relative | 20 |
| Oncle's spouse | 18 |
| Oncle's wife | 16 |
| Oncologist's suffix | 23 |
| Oncologist's suggestion | 27 |
| Oncology procedure | 18 |
| Oncoming | 8 |
| One | 3 |
| One in Arles | 13 |
| One in Berlin | 14 |
| One in Bonn | 12 |
| One in Essen | 13 |
| One in Oaxaca | 14 |
| One in Paris | 13 |
| One to Juan | 12 |
| One ___ (sandlot game) | 23 |
| One ''A'' in Paris | 34 |
| One 'twixt 12 and 20 | 24 |
| One "a-leaping" in a Christmas song | 45 |
| One "Arab Spring" nation | 34 |
| One "B" of B&B | 28 |
| One "born free" | 25 |
| One "C" in C.C.C. | 27 |
| One "caught" on grainy film | 37 |
| One "coming" in a Three Dog Night hit | 47 |
| One "E" on a scoreboard | 33 |
| One "fair of face" | 28 |
| One "hissed" in a melodrama | 37 |
| One "in de cold, cold ground" | 39 |
| One "in the woods" | 28 |
| One "little woman" | 28 |
| One "out" in la la land | 33 |
| One "Pac-Man" ghost | 29 |
| One "standing by the ocean's roar," in a 1963 song | 64 |
| One "T" of TNT | 24 |
| One "tamed" in Shakespeare | 36 |
| One "Tarzan" portrayer | 32 |
| One "trapped by his sinful talk," in Proverbs | 55 |
| One "who intimately lives with rain," in a poem | 57 |
| One "whose faulty vision sees things as they are, not as they ought to be": Bierce | 92 |
| One "with no invisible means of support": Sheen | 57 |
| One (Ger.) | 10 |
| One (Pref.) | 11 |
| One + one, to Burns | 19 |
| One + one? | 10 |
| One - one of perhaps many | 25 |
| One -- customer | 15 |
| One -- kind | 11 |
| One -- million | 14 |
| One -- time | 11 |
| One --- customer | 16 |
| One ... | 7 |
| One / customer connector | 24 |
| One 13th of the month? | 22 |
| One 13th? | 9 |
| One 60-thousandth of a min. | 27 |
| One 60-trillionth of a min. | 27 |
| One a day, e.g. | 15 |
| One A in aka | 12 |
| One A in AMA | 12 |
| One a Koufax quartet | 20 |
| One a woman can't trust | 27 |
| One a'courting | 18 |
| One a-courting | 14 |
| One abandoned at the altar? | 27 |
| One about Jerry Springer debuted in 2003 | 40 |
| One about to shoot | 18 |
| One above a specialist: Abbr. | 29 |
| One above a tenor | 17 |
| One above the ground | 20 |
| One above the Lötschberg Tunnel | 34 |
| One abroad | 10 |
| One abroad? | 11 |
| One accepted for a job | 22 |
| One accepting a challenge | 25 |
| One accepting the world as it is | 32 |
| One accomplishing a great deal | 30 |
| One accumulating dirt? | 22 |
| One accustomed to the pole position? | 36 |
| One acre, e.g. | 14 |
| One across or one down, e.g. | 28 |
| One across the border? | 22 |
| One acting | 10 |
| One acting badly | 16 |
| One acting badly? | 17 |
| One acting for another | 22 |
| One acting on impulse? | 22 |
| One acting on your behalf | 25 |
| One active in the heat? | 23 |
| One actor, or two American presidents | 37 |
| One actress, or two British prime ministers | 43 |
| One Adam Twelve, e.g. | 21 |
| One adding kick | 15 |
| One adding things up | 20 |
| One addressed as "lord" | 33 |
| One adept at pulling strings? | 29 |
| One adept at serving | 20 |