| O'Neill's forte | 23 |
| O'Neill's Jones | 23 |
| O'Neill's monogram | 26 |
| O'Neill's mother | 24 |
| O'Neill's specialty | 27 |
| O'Neill's trees | 23 |
| O'Neill's Yank, e.g. | 28 |
| O'Neill's ___ Smith | 27 |
| O'Neill, to Fellini | 23 |
| O'Reilly of MASH | 24 |
| O'Reilly of Fox News | 24 |
| O'Rourke of F Troop | 27 |
| O's and A's org. | 24 |
| O'Shea of The Verdict | 29 |
| O'Shea of music-hall fame | 29 |
| O'Sullivan from Boyle | 25 |
| O'Toole from Connemara | 26 |
| O, in a phonetic alphabet | 25 |
| O-___-O (brand of sponge) | 25 |
| O. Henry 1906 publication | 25 |
| O. Henry concoction: Abbr. | 26 |
| O. Henry is known for one | 25 |
| O. Henry literary device | 24 |
| O. Henry plot specialty | 23 |
| O. Henry's gift givers | 26 |
| O. Henry's gift-givers | 26 |
| O. Henry's monogram | 23 |
| O. Henry's pet device | 25 |
| O. Henry's specialty | 24 |
| O. J. Simpson as a bard? | 24 |
| O. J. Simpson trial judge | 25 |
| O. J. Simpson's univ. | 25 |
| O. W. Holmes's carriage | 27 |
| O. W. Holmes's vehicle | 26 |
| O.J. or hot choc., e.g. | 23 |
| O.J. Simpson defender Robert | 28 |
| O.J. Simpson prosecutor Clark | 29 |
| O.J. Simpson trial judge | 24 |
| O.J. Simpson was in it | 22 |
| O.J. trial judge Lance | 22 |
| O.J.'s famous houseguest | 28 |
| O.J.'s judge et al. | 24 |
| O.K. at the P.O., as a letter | 29 |
| O.K. Corral figure Wyatt | 24 |
| O.K. Corral gang member | 23 |
| O.K. Corral gunfighter | 22 |
| O.K. Corral gunslinger | 22 |
| O.K. Corral lawman Wyatt | 24 |
| O.K. Corral shooter Clanton | 27 |
| O.K. for another season | 23 |
| O.K. for the diet-conscious | 27 |
| O.K.'s from city hall | 25 |
| O.K., as some spell it | 22 |
| O.M.B. director under Carter | 28 |
| O.S.S. chief in W. W. II | 24 |
| O.S.S.'s successor | 22 |
| O.T. book before Daniel | 23 |
| O.T. book before Jeremiah | 25 |
| O.T. book named for a woman | 27 |
| O.T. book read at Purim | 23 |
| O.T. book read during Purim | 27 |
| O.T. book read on Purim | 23 |
| O.T. man rebuked by an ass | 26 |
| O.T. name for Jerusalem | 23 |
| O.T. prophet and namesakes | 26 |
| O.T. term of unknown meaning | 28 |
| O.T.'s Mizraim, today | 25 |
| Oahu "howdy-do" | 25 |
| Oahu "thank you" | 26 |
| Oahu dance, to a Cockney | 24 |
| Oahu florist's creation | 27 |
| Oahu instrument, for short | 26 |
| Oahu music makers, briefly | 26 |
| Oahu's highest peak | 23 |
| Oak and Maple, briefly | 22 |
| Oak in the embryonic stage | 26 |
| Oak Lawn-to-Chicago dir. | 24 |
| Oak leaf cluster features | 25 |
| Oak product ... or source | 25 |
| Oak Ridge Boys classic | 22 |
| Oak Ridge highway posting? | 26 |
| Oak-leaf cluster feature | 24 |
| Oaken bucket or gray mare | 25 |
| Oaken bucket's binding | 26 |
| Oaken bucket's milieu | 25 |
| Oakes of "CHiPs" | 26 |
| Oakland A's great Joe | 25 |
| Oakland A's legend Joe | 26 |
| Oakland A's manager Macha | 29 |
| Oakland Athletics owner Billy | 29 |
| Oakland daily, for short | 24 |
| Oakland Oaks' org. | 22 |
| Oakland paper, familiarly | 25 |
| Oakland paper, informally | 25 |
| Oakland's neighbor | 22 |
| Oakland, Berkeley, etc. | 23 |
| Oakland-to-Stockton dir. | 24 |
| OAR "___ to You" | 26 |
| Oars in a quad scull, e.g. | 26 |
| Oases that aren't there | 27 |