| Clue | Source | Date |
|---|---|---|
| Strenuously working trait had to change | The Times Quick Cryptic | 28 Aug 2026 |
| Working diligently | New York Times | 07 Dec 2016 |
| Working diligently | ||
| Spot artist over in club very busy | The Telegraph Toughie | 29 Apr 2015 |
| Working diligently | ||
| Plugging away | ||
| Like those participating in 37-Down | ||
| Busy as a bee | ||
| Busy as a bee |