| XXX activity | 12 |
| Two-person pencil-and-paper game | 32 |
| Three-in-a-row game | 19 |
| It's rarely won | 19 |
| Game with a board that resembles a pound sign | 45 |
| Game that's the hidden theme of this puzzle | 47 |
| Game that often ends in a tie | 29 |
| Game in which crosses are used | 30 |
| Game featured in the movie "WarGames" | 47 |
| Cat's game game | 19 |
| First line of a couplet pertinent to this puzzle | 48 |
| Three-letter combinations hidden in this puzzle's six other longest answers | 79 |
| Simple leggy game of three-in-a-row? | 36 |
| Always starting in the middle square, e.g. | 42 |
| Colors slightly | 15 |
| Three times daily, on an Rx | 27 |
| Thrice daily, on an Rx | 22 |
| Thrice daily, in prescriptions | 30 |
| Pharmacist's abbr. | 22 |
| Mood, in Scotland | 17 |
| Where seawater remains after an ebb | 35 |
| Thrice daily, in Rx's | 25 |
| Thrice daily, in pharm. | 23 |
| Thrice a day, on prescriptions: Abbr. | 37 |
| Three times a day: Abbr. | 24 |
| Three times a day, to an MD | 27 |
| Three times a day, in RX's | 30 |
| Three times a day, in prescriptions | 35 |
| Three times a day, in pharmacist shorthand | 42 |
| Highlands mood | 14 |
| Every 8 hours, on prescriptions | 31 |
| Kind of basin | 13 |
| Kind of basin or wave | 21 |
| Word with basin or wave | 23 |
| Of ocean motion | 15 |
| Kind of wave or basin | 21 |
| Kind of pool or wave | 20 |
| Word with "basin" or "wave" | 47 |
| Type of wave or bore | 20 |
| Rising and falling | 18 |
| Of ebb and flow | 15 |
| Kind of bore | 12 |
| Re ebb and flow | 15 |
| Pertaining to neap and ebb | 26 |
| Word with bore or basin | 23 |
| Word with "wave" or "pool" | 46 |
| Word before basin or wave | 25 |
| Wave preceder | 13 |
| Type of pool or wave | 20 |
| Subject to ebbs and flows | 25 |
| Rising and falling periodically | 31 |
| Re ocean motion | 15 |
| Of neap and ebb | 15 |
| Like some bores | 15 |
| Like some basins | 16 |
| Kind of bore or wave | 20 |
| Kind of bore or basin | 21 |
| Kind of basin or pool | 21 |
| Flowing and ebbing | 18 |
| Ebbing and flowing | 18 |
| Big kind of wave | 16 |
| Word with wave or pool | 22 |
| Word with wave | 14 |
| Word with bore or wave | 22 |
| Word with basin or flat | 23 |
| Word with "bore" or "wave" | 46 |
| Word with ''basin'' or ''wave'' | 63 |
| Word before wave or basin | 25 |
| Word before basin or pool | 25 |
| Wave-related | 12 |
| Wave or bore | 12 |
| Wave or basin | 13 |
| Wave modifier | 13 |
| Start of a big wave? | 20 |
| Sort of bore | 12 |
| Regarding ebb and flow | 22 |
| Periodically rising and falling | 31 |
| Periodically flowing and ebbing | 31 |
| Of oceanic movements | 20 |
| Of an ocean motion | 18 |
| Like some rivers | 16 |
| Like some ocean waves | 21 |
| Like some moon-based movements | 30 |
| Like some flats | 15 |
| Like some almanac data | 22 |
| Like ocean currents | 19 |
| Kind of wave or river | 21 |
| Kind of wave or pool | 20 |
| Kind of basin or flow | 21 |
| Kind of a bore | 14 |
| Formed by inflow and outflow | 28 |
| Fiona Apple debut | 17 |
| Fiona Apple "Shadowboxer" album | 41 |
| Dangerous kind of wave | 22 |
| Cyclical, at the beach | 22 |
| Concerning ebb and flow | 23 |
| Affected by the moon, in a way | 30 |
| Affected by the moon | 20 |
| -- wave | 7 |
| ___ wave (powerful ocean movement) | 34 |