| 100% | SWIM | 4 | Do the breaststroke or the butterfly stroke as a fun recreational activity on an island, say |
| 57% | SURF | 4 | Ride the waves as a fun recreational activity on an island |
| 50% | BALL | 4 | Soccer sphere that you can play with as a fun recreational activity on an island |
| 50% | SNORKEL | 7 | Tube that lets you breathe while looking at fishes as a fun recreational activity on an island |
| 49% | PICNIC | 6 | Informal meal at the beachside that could be a fun recreational activity on an island |
| 33% | WELLAIMED | 9 | On the mark, as an insult or a dart |
| 32% | SWIMS | 5 | Does the breaststroke or butterfly |
| 29% | SWIM | 4 | Do the butterfly stroke, say |
| 29% | SWAM | 4 | Did the butterfly stroke, say |
| 29% | CHANGELANES | 11 | What you might do to pass on an Interstate ... or a phonetic hint to the starts of 18-, 28- and 50-Across |
| 29% | SWAM | 4 | Did the front crawl or breaststroke, say |
| 28% | ARRANGE | 7 | Do the work of a florist or an orchestrator |
| 28% | TUBING | 6 | Recreational activity that may be done on water or snow |
| 27% | CIVIC | 5 | Do your ___ duty (vote or serve on a jury, say) |
| 26% | SHOP | 4 | What you may do on the Friday after Thanksgiving as a family tradition |
| 26% | KRONSTADT | 9 | Town in St Petersburg, Russia; site of a 1921 rebellion on an island in the Gulf of Finland |
| 26% | FRUITIEST | 9 | Tasting the most like an orange or a banana, say |
| 26% | SNAIL | 5 | "What did the ___ say when it was riding on the back of a turtle? Wheeeee!" |
| 26% | THOTH | 5 | Egyptian deity depicted as a man with the head of an ibis or a baboon |
| 26% | ACCENT | 6 | Mark on a letter such as a grave, circumflex or acute in the French language |
| 26% | SWIM | 4 | Do the breaststroke, say |
| 26% | SWAM | 4 | Did the breaststroke, say |
| 25% | KICKSTARTS | 10 | Reinvigorates, as an economy ... or a hint to the beginnings of the answers to starred clues |
| 25% | SWIM | 4 | Do the backstroke or butterfly |
| 25% | SWIMS | 5 | Does the sidestroke or butterfly |
| 25% | SWIMS | 5 | Does the crawl or butterfly |
| 25% | SWIM | 4 | Do the backstroke or breaststroke |
| 25% | ATBAT | 5 | A walk or a hit by pitch does not count as an official one |
| 25% | MINUET | 6 | It's done in the form of an S or a Z |
| 25% | LIE | 3 | Stand's opposite ... or a bad thing to do on the stand |