| Text | Length |
| On __ with (equal to) | 21 |
| On ___ (commensurate) | 21 |
| On -- with (equal to) | 21 |
| Of little pollinators | 21 |
| Online store offering | 21 |
| Oft-downloaded things | 21 |
| One end of a basilica | 21 |
| One of a Kipling trio | 21 |
| One of the Musketeers | 21 |
| Old Italian strongbox | 21 |
| Olympic skater Schenk | 21 |
| One may be restricted | 21 |
| One often precedes it | 21 |
| Olympian with a spear | 21 |
| Oldest city in Greece | 21 |
| Old shipping nickname | 21 |
| Onassis' nickname | 21 |
| Onassis, to his pals | 21 |
| Opera diva's solo | 21 |
| Operatic show-stopper | 21 |
| Operatic song for one | 21 |
| Opera-house highlight | 21 |
| Opera house highlight | 21 |
| Often dramatic number | 21 |
| Operatic showstoppers | 21 |
| Operatic performances | 21 |
| One of the fire signs | 21 |
| Onassis and Fleischer | 21 |
| Off one's rocker? | 21 |
| Onetime Kenny G label | 21 |
| Old flat-bottom boats | 21 |
| On --- (going strong) | 21 |
| On _____ (doing well) | 21 |
| On ___ (going strong) | 21 |
| Olfactory enticements | 21 |
| On the right and left | 21 |
| Old synthesizer brand | 21 |
| Organized arrangement | 21 |
| One who's printed | 21 |
| Opposite of departure | 21 |
| One of the metalloids | 21 |
| One of the humanities | 21 |
| Overly stylish, maybe | 21 |
| Ostentatious neckwear | 21 |
| Out on the briny blue | 21 |
| Out of sight of shore | 21 |
| Out fishing, possibly | 21 |
| On the Atlantic, e.g. | 21 |
| On a cruise ship, say | 21 |
| One side of the Urals | 21 |
| One of the continents | 21 |
| Out of the mainstream | 21 |
| Off the direct course | 21 |
| One showing curiosity | 21 |
| Opposite of hard time | 21 |
| Onetime Moore co-star | 21 |
| On (a specified time) | 21 |
| One thing to consider | 21 |
| Opposite of liability | 21 |
| One's house, e.g. | 21 |
| Organizations (Abbr.) | 21 |
| Often-allergic attack | 21 |
| OO7's _____Martin | 21 |
| On horseback, perhaps | 21 |
| Opposed to sidesaddle | 21 |
| One ___ time (singly) | 21 |
| Opposite of extremely | 21 |
| Old arcade game maker | 21 |
| On --- (running amok) | 21 |
| Ordered delivery, say | 21 |
| Org. involved in Waco | 21 |
| Olympian, e.g.: Abbr. | 21 |
| Odysseus' advisor | 21 |
| Off the perpendicular | 21 |
| Ocean east of N. Car. | 21 |
| Oxygen's 8: Abbr. | 21 |
| One in a chain, often | 21 |
| On ___ (making merry) | 21 |
| One that does: Suffix | 21 |
| Org. for Rafael Nadal | 21 |
| Org. for Andy Roddick | 21 |
| One place to flounder | 21 |
| Overhead storage spot | 21 |
| Overhead storage area | 21 |
| Ones with legal degs. | 21 |
| Off-roader, for short | 21 |
| Off-road ride (abbr.) | 21 |
| Off-road bikes: Abbr. | 21 |
| One way to serve beef | 21 |
| One who is materteral | 21 |
| Outer part of the ear | 21 |
| One with a waxed body | 21 |
| One-time Mrs. Sinatra | 21 |
| Of doves, hawks, etc. | 21 |
| Of robins and rollers | 21 |
| Overwhelmed, in a way | 21 |
| Overwhelms an admirer | 21 |
| On ___ (capriciously) | 21 |
| Opened one's eyes | 21 |
| Over-the-hill letters | 21 |
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