| Clue | Source | Date |
|---|---|---|
| Shaped like a half-moon | ||
| Numeral is strangely half-moon shaped(9) | ||
| Shaped like half a circle or a crescent | The Telegraph Cross Atlantic | 30 Oct 2024 |
| Numeral is strangely half-moon shaped | The Times Cryptic | 09 Oct 2024 |
| Like a half-moon | The Times Concise | 28 Jul 2022 |
| Surgeon's first working rule: man, I like the aortic valve! | ||
| Crescent-shaped |