| Ontario's capital on a sports ticker, | 41 |
| Ontario's capital, on a scoreboard | 38 |
| Ontario's capital, on scoreboards | 37 |
| Ontario's capital, on sports tickers | 40 |
| Ontario's flower | 20 |
| Ontario's Fort ___ | 22 |
| Ontario's Little _____ | 26 |
| Ontario's Michelle ______ | 29 |
| Ontario's neighbor | 22 |
| Ontario's official bird | 27 |
| Ontario's Old ___ William | 29 |
| Ontario's Premier David | 27 |
| Ontario's Premier Ernie | 27 |
| Ontario's provincial bird | 29 |
| Ontario's Red _____ | 23 |
| Ontario's Sault ___ Marie | 29 |
| Ontario's second most populous city | 39 |
| Ontario's second-largest city | 33 |
| Ontario's Shania ____ | 25 |
| Ontario's St. Lawrence______ | 32 |
| Ontario's tree | 18 |
| Ontario's __ Tower | 22 |
| Ontario's ___ Canal | 23 |
| Ontario's ___ Canals | 24 |
| Ontario's ___ Locks | 23 |
| Ontario's ____ Hill | 23 |
| Ontario's ____ locks | 24 |
| Ontario's ____Centre | 24 |
| Ontario's _____ Carl Roy | 29 |
| Ontario's _____ Dick | 24 |
| Ontario's _____ Hill | 24 |
| Ontario's _____ Lake | 24 |
| Ontario's _____Bernardo | 27 |
| Ontario's _____Demeter | 26 |
| Ontario's ______ Canal | 27 |
| Ontario's ______canal | 25 |
| Ontario, abbr. | 14 |
| Ontario, e.g. | 13 |
| Ontario, for example | 20 |
| Ontario, for one | 16 |
| Ontario, par exemple | 20 |
| Ontario-born hockey legend | 26 |
| Ontario-born hockey legend Bobby | 32 |
| Ontario-Huron link | 18 |
| Ontario-Quebec border river | 27 |
| OntarioÂ’s Sault ___ Marie | 29 |
| Onto | 4 |
| Onto land | 9 |
| Onto the beach | 14 |
| Onto the jive | 13 |
| Onto the sand | 13 |
| Onto, in jive talk | 18 |
| Onto, with ''of'' | 33 |
| Onto, with "of" | 25 |
| Ontologist's concern | 24 |
| Ontologists' concerns | 25 |
| Onus | 4 |
| Onward | 6 |
| Onward in time | 14 |
| Onward's partner | 20 |
| Onward, in Naples | 17 |
| Onward: Fr. | 11 |
| Onward: It. | 11 |
| Onyx and ebony | 14 |
| Onyx and opal | 13 |
| Onyx features | 13 |
| Onyx hit about impact? | 22 |
| Onyx or amethyst | 16 |
| Onyx or opal | 12 |
| Onyx piece | 10 |
| Onyx relative | 13 |
| Onyx, e.g. | 10 |
| Onyx-like minerals | 18 |
| Onyxes and opals | 16 |
| On_____(precisely) | 18 |
| On_____with | 11 |
| OO | 2 |
| Oo-la-la leading lady of the 30's | 37 |
| OO7 Author Fleming | 18 |
| OO7 creator, for one | 20 |
| OO7 writer, Fleming | 20 |
| OO7's _____Martin | 21 |
| Oobleck's creator | 21 |
| Oobleck, e.g. | 13 |
| Oocyte | 6 |
| Oocytes, eventually | 19 |
| Oodle | 5 |
| Oodle? | 6 |
| Oodles | 6 |
| Oodles and oodles | 17 |
| Oodles of | 9 |
| Oodles of dough | 15 |
| Oodles of ounces | 16 |
| Oodles of oz. | 13 |
| Oodles of pounds | 16 |
| Oodles of time | 14 |
| Oodles; gobs | 12 |
| Oogenesis product | 17 |
| Ooh and -- | 10 |
| Ooh and aah | 11 |