| Clue | Source | Date |
|---|---|---|
| Not previously thought to be possible | ||
| Formed a dune? Who would have thought? (9,2) | ||
| Not thought to be possible (9-2) | ||
| Mind-boggling — Freud moaned (anag) | The Guardian Quick | 07 Apr 2023 |
| Inconceivable | The Telegraph Quick | 29 Jan 2021 |
| Inconceivable |