| Clue | Source | Date |
|---|---|---|
| Formal academic dress worn at the University of Oxford | The Times Specialist | 27 Oct 2025 |
| Dark formal clothing (worn during exams at some universities) | The Guardian Quick | 24 Feb 2023 |
| Dull, gloomy | The Times Concise | 08 Mar 2022 |
| Dull, gloomy | The Times Concise | 28 Mar 2019 |