| Occupation made obsolete by print | 33 |
| Occupation not much seen nowadays? | 34 |
| Occupation symbolized by the Star of Life | 41 |
| Occupation with an unsavory reputation | 38 |
| Occupation with its own category of jokes | 41 |
| Occupational hazards for apiarists | 34 |
| Occupational hazards for short-order cooks | 42 |
| Occupational Outlook Handbook issuer: Abbr. | 43 |
| Occupied-nation officials: Abbr. | 32 |
| Occupiers of Britain and Spain in pre-Roman times | 49 |
| Occupy ___ (West Coast tuition hike protests) | 45 |
| Occupying a very wide part of a road? | 37 |
| Occurred to (with ''on'') | 41 |
| Occurred to (with "on") | 33 |
| Occurred to, with "on" | 32 |
| Occurrence at the moon's first quarter | 42 |
| Occurrence before the chute opens | 33 |
| Occurrence in the moon's first quarter | 42 |
| Occurring 40 to 55 million years ago | 36 |
| Occurring after surgery, briefly | 32 |
| Occurring around the 30th, as store sales: abbr. | 48 |
| Occurring as an isolated instance | 33 |
| Occurring before surgery, informally | 36 |
| Occurring before the Renaissance, e.g. | 38 |
| Occurring every nine weeks, roughly | 35 |
| Occurring every other leap year, say | 36 |
| Occurring shortly after civil twilight begins | 45 |
| Occurring within Ohio's borders e.g. | 41 |
| Ocean explorer who weighs next to nothing? | 42 |
| Ocean floor dweller that vomits in self-defense | 47 |
| Ocean freezer in "Cat's Cradle" | 45 |
| Ocean liner destination, sometimes | 34 |
| Ocean phenomenon affecting the weather | 38 |
| Ocean Spray's ___-Apple juice | 33 |
| Ocean that the Amazon Riv. ends up in | 37 |
| Ocean trip with a skeleton crew? | 32 |
| Oceanic phenomenon that affects weather | 39 |
| Oceanside town north of San Diego | 33 |
| Ochoa who won the 2007 Women's British Open | 47 |
| Ochs of "Der Rosenkavalier" | 37 |
| Ochs, in "Der Rosenkavalier" | 38 |
| Oct. start of a new Supreme Court session | 41 |
| Octave's counterpart in a sonnet | 36 |
| Octaves' followers in sonnets | 33 |
| Octet "a-milking" in a Christmas song | 47 |
| Octet followers, in Italian sonnets | 35 |
| Octet member with the shortest name | 35 |
| October 1914's Battle of the ___ | 36 |
| October 2008 bailout provider: Abbr. | 36 |
| October baseball letters since 1969 | 35 |
| October event, informally, with "the" | 47 |
| October suffix meaning "celebration" | 46 |
| Octogenarian on the Gulf of Guinea? | 35 |
| Octogenarian's goal in life? | 32 |
| Octogenarian's next milestone | 33 |
| Ocular affliction for an iced dessert lover? | 44 |
| Ocular inflammation also known as conjunctivitis | 48 |
| Oda ___ Brown (Oscar-winning role) | 34 |
| Oda ___ Brown, Whoopi in "Ghost" | 42 |
| Odd article to wear with a turtleneck | 37 |
| Odd attire for “casual Friday” | 38 |
| Odd container for baby back ribs? | 33 |
| Odd container for cattle herders? | 33 |
| Odd container for charitable gifts? | 35 |
| Odd container for collector's sample coin? | 46 |
| Odd container for what's all in your head? | 46 |
| Odd double container for gift fruit? | 36 |
| Odd from a conventional viewpoint | 33 |
| Odd Future member Frank who recently came out | 45 |
| Odd group that included Sammy Davis, Jr. | 40 |
| Odd group that included Tom Hayden | 34 |
| Odd sign at a Michelin dealership? | 34 |
| Odd sign at Men's Wearhouse? | 32 |
| Odd sign at Victoria's Secret? | 34 |
| Oddly sequenced 2000 Guy Pearce movie | 37 |
| Oddly-sized, like clothing (abbr.) | 34 |
| Oddly-sized, like clothing: abbr. | 33 |
| Odds against this are 649,739 to 1 | 34 |
| Odds for a Kentucky Derby favorite, perhaps | 43 |
| Odds of being allergic to it: 1 in 230,000,000 | 46 |
| Odds of drawing to one aren't very good | 43 |
| Odds of finding one on the first try: 1 in 10,000 | 49 |
| Odds of not surviving a true decimation | 39 |
| Oder-__ Line (German-Polish border) | 35 |
| Oder-___ Line (German-Polish border) | 36 |
| Odets's "Waiting for ___" | 39 |
| Odette's opposite in "Swan Lake" | 46 |
| Odin's "chooser of the slain" | 43 |
| Odin's wife in 2011's "Thor" | 46 |
| Odist with a type of ode named for him | 38 |
| Odysseus saw him as a shade in the underworld | 45 |
| Odysseus, to the Cyclops Polyphemus | 35 |
| Oedipus's father (and murder victim) | 40 |
| Oedipus's realm in Greek myth | 33 |
| Oenophile's vacation destinations | 37 |
| Oenophile, as a mixed-up Michigan athlete? | 42 |
| Of a bride's matrimonial portion | 36 |
| Of a certain work having 24 books | 33 |
| Of a hypothetical unit of living matter | 39 |
| Of a liquid's specific gravity | 34 |