| Clue | Source | Date |
|---|---|---|
| Foolish person (informal) | The Guardian Quick | 09 May 2023 |
| Dotty and William - one's a fool | Irish Times Crosaire | 30 Oct 2019 |
| Clownish type | Premier Sunday | 15 Apr 2018 |
| Not so smart with rhymes? | Universal | 03 Apr 2017 |
| Not so smart with rhymes? | ||
| On edge, unknown couple admitting charge — one's a fool | The Times Cryptic | 20 Jul 2015 |
| Foolish one | ||
| Clownish one | ||
| William IV of England. | ||
| Nickname of England's William IV. |