| Clue | Source | Date |
|---|---|---|
| A large wet area, and that's flat! (4,3) | ||
| Tranquillity to spot on moon face? (4,3) | ||
| Smooth sailing site | New York Times | 16 Jan 2019 |
| Smooth sailing site | ||
| Setting for smooth sailing | LA Times Daily | 11 Sep 2018 |
| Setting for smooth sailing | The Washington Post | 11 Sep 2018 |
| Setting for smooth sailing | ||
| It makes for smooth sailing | New York Times | 17 Jan 2016 |
| It makes for smooth sailing | ||
| It's no salt shaker | ||
| 1869 coastal painting by Gustave Courbet, with "The" |