| Text | Length |
| Optimist's belief | 21 |
| Old cause of fainting | 21 |
| O. Henry story ending | 21 |
| Odin's oldest son | 21 |
| One day a week is his | 21 |
| Olga, Masha and Irina | 21 |
| One of two nonwaiters | 21 |
| Overtime prerequisite | 21 |
| Old Dixieland classic | 21 |
| Orange-and-black cats | 21 |
| Oscar-winning Swinton | 21 |
| Oscar actress Swinton | 21 |
| One of a Scrabble 100 | 21 |
| Ones with read faces? | 21 |
| Of poor sound quality | 21 |
| Onetime color-TV knob | 21 |
| One of a dyeing breed | 21 |
| One job for a stylist | 21 |
| Old-timey affirmation | 21 |
| One of Ali's wins | 21 |
| Onetime Nascar outlet | 21 |
| One kind of U.S. bond | 21 |
| One who's a goner | 21 |
| One option for Hamlet | 21 |
| Order in a rush order | 21 |
| Oft-stubbed extremity | 21 |
| Open or pigeon add-on | 21 |
| One taking pot shots? | 21 |
| Onetime Olympics host | 21 |
| One who halves drums? | 21 |
| Of music having a key | 21 |
| Office machine supply | 21 |
| Office machine powder | 21 |
| One down in the mouth | 21 |
| Overindulge, in a way | 21 |
| Opening for an anchor | 21 |
| Old Testament section | 21 |
| One waving a red flag | 21 |
| One way to put things | 21 |
| One way to lay things | 21 |
| Ontario's capital | 21 |
| One hurling something | 21 |
| One taking baby steps | 21 |
| One in training pants | 21 |
| On a scale of one ___ | 21 |
| Off-campus nonstudent | 21 |
| Old cars for new ones | 21 |
| Onetime London outing | 21 |
| One with an itinerary | 21 |
| One-fifth of quindici | 21 |
| One less than quattro | 21 |
| One who grabs the tab | 21 |
| Out on a limb, really | 21 |
| One less than quadri- | 21 |
| Old Bailey occurrence | 21 |
| One of three siblings | 21 |
| Onetime Barbary state | 21 |
| Overused, as a phrase | 21 |
| Overused, as a saying | 21 |
| Order at a horse show | 21 |
| One-man Broadway show | 21 |
| One spurning learning | 21 |
| Onetime Russian ruler | 21 |
| Old Russian sovereign | 21 |
| Old emperor of Russia | 21 |
| Onetime Russian royal | 21 |
| Omnipotent potentates | 21 |
| Oktoberfest band horn | 21 |
| One who fixes a piano | 21 |
| One-on-one instructor | 21 |
| Onetime flight inits. | 21 |
| Old-timey contraction | 21 |
| One with a look-alike | 21 |
| One in a crowded womb | 21 |
| O. Henry tale feature | 21 |
| One less than a crowd | 21 |
| Orchestral percussion | 21 |
| Office machine: Abbr. | 21 |
| Old newspaper workers | 21 |
| Over, in Osnabrück | 21 |
| Over, in Oberammergau | 21 |
| Outer Hebrides island | 21 |
| Out, in the Transvaal | 21 |
| One of the long bones | 21 |
| Of the previous month | 21 |
| One in Düsseldorf? | 21 |
| One crouching at home | 21 |
| One at home in a mask | 21 |
| Org. for coal diggers | 21 |
| Ore diggers' org. | 21 |
| Ore digger's org. | 21 |
| Open, as a gate latch | 21 |
| Open a bottle of soda | 21 |
| Open, as a fern frond | 21 |
| On a lower level than | 21 |
| Opposite of overcome? | 21 |
| One working on a plot | 21 |
| One places for bribes | 21 |
| Opened, as a fastener | 21 |
| Opposite of cool, man | 21 |
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