| Of a Greek philosopher | 22 |
| Of a Great Lake period | 22 |
| Of a gland: Comb. form | 22 |
| Of a geologic time division | 27 |
| Of a genus-species system | 25 |
| Of a former Venetian ruler | 26 |
| Of a forearm bone: Comb. form | 29 |
| Of a flower's receptacle | 28 |
| Of a fertilizer chemical | 24 |
| Of a feather, so to speak | 25 |
| Of a dark, volcanic rock | 24 |
| Of a dark grayish blue | 22 |
| Of a cultural subgroup | 22 |
| Of a continent: Prefix | 22 |
| Of a condition of imbalance | 27 |
| Of a common metallic element | 28 |
| Of a classification of people | 29 |
| Of a classical Greek order | 26 |
| Of a church-choir area | 22 |
| Of a chemical compound | 22 |
| Of a certain time period | 24 |
| Of a certain philosophy | 23 |
| Of a certain part of speech | 27 |
| Of a certain openwork pattern | 29 |
| Of a certain number system | 26 |
| Of a certain noble rank | 23 |
| Of a certain legal action | 25 |
| Of a certain grain cereal | 25 |
| Of a certain earth science | 26 |
| Of a certain cereal grass | 25 |
| Of a certain bodily system | 26 |
| Of a Bronze Age culture | 23 |
| Of a bride's estate | 23 |
| Of a breathless condition | 25 |
| Of a book's leaves | 22 |
| Of a bishop's authority | 27 |
| Of a bird's spurious wing | 29 |
| Of a biological partition | 25 |
| Of a 19th-cent. essayist | 24 |
| Of $'s and ¢'s | 25 |
| Oeufs à ___ (menu item) | 26 |
| Oenophile's superlative | 27 |
| Oenophile's specification | 29 |
| Oenophile's selection | 25 |
| Oenophile's question | 24 |
| Oenophile's organizer | 25 |
| Oenophile's interest | 24 |
| Oenophile's installation | 28 |
| Oenophile's criterion | 25 |
| Oenophile's concern | 23 |
| Oenophile's bouquet | 23 |
| Oenophile's adjective | 25 |
| Oenone's husband, in myth | 29 |
| Oenologists' storerooms | 27 |
| Oenologists' concerns | 25 |
| Oenologist's stock | 22 |
| Oenologist's specialty | 26 |
| Oenologist's interest | 25 |
| Oenologist's goal? | 22 |
| Oenologist's expertise | 26 |
| Oenologist's concern | 24 |
| Oenologist's activity | 25 |
| Oedipus' tragic flaw | 24 |
| Oedipus' foster father | 26 |
| Oedipus' arrogance, e.g. | 28 |
| Odyssey with Kirk and Spock | 27 |
| Odysseus, to Polyphemus | 23 |
| Odysseus's faithful dog | 27 |
| Odysseus's advisor | 22 |
| Odysseus's adviser | 22 |
| Odysseus' temptresses | 25 |
| Odysseus' smart dog | 23 |
| Odysseus' one-eyed jailer | 29 |
| Odysseus' narrator | 22 |
| Odysseus' life saver | 24 |
| Odysseus' hometown | 22 |
| Odysseus' homeland | 22 |
| Odysseus' faithful dog | 26 |
| Odysseus trio, to Homer | 23 |
| ODs, with "out" | 25 |
| Odor fighter from Clorox | 24 |
| Odontologist's org. | 23 |
| Odometer readout in a new car | 29 |
| Odomes of the Buffalo Bills | 27 |
| Odom of the LA Clippers | 23 |
| Odom of the L.A. Clippers | 25 |
| Odo portrayer Auberjonois | 25 |
| Odists' instruments | 23 |
| Odist's preposition | 23 |
| Odist's inspiration | 23 |
| Odist's deep black | 22 |
| Odist's contraction | 23 |
| Odist to a nightingale | 22 |
| Odin, Thor, Balder et al. | 25 |
| Odin's worshippers | 22 |
| Odin's thunderous son | 25 |
| Odin's spouse: Var. | 23 |
| Odin's eight-legged mount | 29 |
| Odin's belligerent son | 26 |
| Odin's bellicose son | 24 |