| Clue | Source | Date |
|---|---|---|
| Doubtful, questionable (13) | ||
| A camp or billet being arranged? It's questionable | The Telegraph Cryptic | 21 Apr 2023 |
| Questionable; doubtful | The Times Concise | 23 Aug 2022 |
| Open to doubt | The Guardian Quick | 27 Jul 2022 |
| Troublesome | The Telegraph Quick | 02 Dec 2021 |
| Dubious | The Times Concise | 22 Sep 2019 |
| Blast a compiler, not having succeeded — terrible puzzle is that! | ||
| Open to doubt or debate |