| O'Neill's "Strange ___" | 41 |
| O'Neill's "The Great ___ Brown" | 49 |
| O'Neill's "The Hairy __" | 42 |
| O'Neill's "The Hairy ___" | 43 |
| O'Neill's "The Iceman ___" | 44 |
| O'Neill's "The __ Cometh" | 43 |
| O'Neill's "The ___ Cometh" | 44 |
| O'Neill's "__ Christie" | 41 |
| O'Neill's "__ for the Misbegotten" | 52 |
| O'Neill's "___ Christie" | 42 |
| O'Neill's "___ for the Misbegotten'' | 57 |
| O'Neill's "___ for the Misbegotten" | 53 |
| O'Neill's "___ Interlude" | 43 |
| O'Neill's "___ Millions" | 42 |
| O'Neill's "___ the Horizon" | 45 |
| O'Neill's Anna | 22 |
| O'Neill's Christie | 26 |
| O'Neill's daughter | 26 |
| O'Neill's Emperor | 25 |
| O'Neill's field | 23 |
| O'Neill's forte | 23 |
| O'Neill's hairy title character | 39 |
| O'Neill's hirsute stoker | 32 |
| O'Neill's Jones | 23 |
| O'Neill's Lavinia Mannon, e.g. | 38 |
| 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, Charlie's wife | 31 |
| O'Neill, to Fellini | 23 |
| O'Reilly of MASH | 24 |
| O'Reilly of Fox News | 24 |
| O'Rourke of F Troop | 27 |
| O'Rourke, e.g., of "F Troop": Abbr. | 49 |
| O's and A's org. | 24 |
| O's and Jays | 16 |
| O's division | 16 |
| O's is 8 | 12 |
| O's is one more than N's | 32 |
| O's overseas | 16 |
| O's predecessors | 20 |
| O's rivals | 14 |
| O's, in letters | 19 |
| O's, to Onassis | 19 |
| O'Shanter | 13 |
| O'Shea of The Verdict | 29 |
| O'Shea of "The Verdict" | 37 |
| O'Shea of films | 19 |
| O'Shea of music-hall fame | 29 |
| O'Shea who appeared on "Ed Sullivan" the same night as the Beatles | 80 |
| O'Sullivan from Boyle | 25 |
| O'Sullivan-O'Toole duo | 30 |
| O'Toole | 11 |
| O'Toole comments on a turkey | 32 |
| O'Toole film playing in Sydney? | 35 |
| O'Toole from Connemara | 26 |
| O'Toole is one | 18 |
| O'Toole of "Cat People" | 37 |
| O'Toole role | 16 |
| O'Toole who played Lola in the TV musical "Copacabana" | 68 |
| O(ne of si)x (for a h)e(xago)n (or five for a pyrami)d | 54 |
| O, A, B or AB | 13 |
| O, e.g. | 7 |
| O, essentially | 14 |
| O, for one | 10 |
| O, H, and O in water | 20 |
| O, in a love note | 17 |
| O, in a phonetic alphabet | 25 |
| O, in communications | 20 |
| O, in letters | 13 |
| O, in many cases | 16 |
| O, in Morse code | 16 |
| O, in old radio lingo | 21 |
| O, more formally | 16 |
| O, often | 8 |
| O, on a telephone | 17 |
| O, once, to hams | 16 |
| O, say | 6 |
| O, symbolically | 15 |
| O, Us or GQ | 11 |
| O- -- ('The Good Earth' role) | 37 |
| O-1 in the USN | 14 |
| O-O, in chess | 13 |
| O-O-O | 5 |
| O-ring, e.g. | 12 |
| O-rings, e.g. | 13 |
| O-shaped | 8 |
| O-T connectors | 14 |
| O-X game: var. | 14 |
| O-yard dash for a gaucho wearer? | 32 |
| O-___ ("Kill Bill" role) | 34 |
| O-___ Ishii (Lucy Liu's role in "Kill Bill") | 58 |
| O-___-O (brand of sponge) | 25 |
| O. borders it | 13 |
| O. E. letter | 12 |
| O. Henry | 8 |
| O. Henry 1906 publication | 25 |