| Optical illusion illustrator | 28 |
| Odd, as a range of knowledge | 28 |
| One of a Mississippi quartet | 28 |
| Old brand along the turnpike | 28 |
| Old self-realization program | 28 |
| Open-shelved furniture piece | 28 |
| One of the film-making Coens | 28 |
| Old operating room substance | 28 |
| Old operating-room substance | 28 |
| On-line option for investors | 28 |
| Otherworldly ones, for short | 28 |
| One may get pins and needles | 28 |
| One of Zsa Zsa's sisters | 28 |
| One of Jolie's daughters | 28 |
| One group of numbers to pick | 28 |
| One of Bo-peep's charges | 28 |
| One catching a ram's eye | 28 |
| One with a complete sentence | 28 |
| One in a head office (abbr.) | 28 |
| Ones banned from their homes | 28 |
| One excited about a birthday | 28 |
| One without lines, generally | 28 |
| Outlying residential regions | 28 |
| Optometrists' procedures | 28 |
| Org. governing traffic above | 28 |
| One-named model-turned-actor | 28 |
| One-named Italian supermodel | 28 |
| One of Chaney's thousand | 28 |
| One is often said to be dead | 28 |
| On the foul line, ironically | 28 |
| One might get past a bouncer | 28 |
| Ocean ______ (BC ghost town) | 28 |
| Old McDonald's residence | 28 |
| Old MacDonald's property | 28 |
| Observes a religious holiday | 28 |
| Org. with a Most Wanted List | 28 |
| Org. with a most-wanted list | 28 |
| Org. that rules the airwaves | 28 |
| Org. that regulates vaccines | 28 |
| Org. concerned with labeling | 28 |
| One way off of Staten Island | 28 |
| Opening for a concertmaster? | 28 |
| Order after "Aim!" | 28 |
| Orlando's state, briefly | 28 |
| On fire, in restaurant lingo | 28 |
| Oedipus' arrogance, e.g. | 28 |
| One going for a little bite? | 28 |
| One with a stable upbringing | 28 |
| One who isn't behind you | 28 |
| Original Shakespeare edition | 28 |
| One million dollars, to some | 28 |
| Ollie and Kukla's friend | 28 |
| One who may converse in Erse | 28 |
| Olympic gold medalist Devers | 28 |
| One in the gleaning business | 28 |
| One who might thank a rubber | 28 |
| Official language of Austria | 28 |
| One committing grave crimes? | 28 |
| Overlays with precious metal | 28 |
| O h ____ : Chi-Lites hit | 28 |
| One may go into an empty net | 28 |
| Opera or concert conclusion? | 28 |
| One making a coffee run, say | 28 |
| Ozzy's Moody Blues cover | 28 |
| One that might take a gander | 28 |
| Offering to an extended palm | 28 |
| Org. founded by Juliette Low | 28 |
| One-time Pontiac muscle cars | 28 |
| On either side of the center | 28 |
| Oscar-winning role for Hanks | 28 |
| Oscar winner as Kris Kringle | 28 |
| One who might crack a mirror | 28 |
| One of Harrison's heroes | 28 |
| One of the Katzenjammer Kids | 28 |
| Overconfident racer of fable | 28 |
| Old-time "Listen!" | 28 |
| One's sense of wellbeing | 28 |
| Obeying a dog school command | 28 |
| One often seen among Bunnies | 28 |
| Original "Playboy" | 28 |
| One who gets what's left | 28 |
| One contacted by an executor | 28 |
| Oscar winner as Elizabeth II | 28 |
| Oscar winner: 1931–32 | 28 |
| Ones among the coop populace | 28 |
| One who's beat but good? | 28 |
| One of a matched pair, maybe | 28 |
| Official scorer's ruling | 28 |
| Ones trying to get picked up | 28 |
| One paid to take people out? | 28 |
| One place to find your honey | 28 |
| Obama's attorney general | 28 |
| Order to a cue card handler? | 28 |
| Outer covering for some nuts | 28 |
| Opposite of a slice, in golf | 28 |
| One with two pairs of shoes? | 28 |
| Over-the-wall wallops: Abbr. | 28 |
| O'Hare or Newark Liberty | 28 |
| One of Spain's Balearics | 28 |
| Optimist's pronouncement | 28 |