| Clue | Source | Date |
|---|---|---|
| The fiftieth anniversary of a significant event (6,7) | ||
| One Mellied bug - it's the 50th (6,7) | ||
| What Elizabeth II celebrated in 2002 (6,7) | The Guardian Quick | 02 Aug 2024 |
| Half-century anniversary (6,7) | ||
| A 50th anniversary | The Telegraph Quick | 27 Dec 2016 |
| 50th-anniversary celebration | ||
| 5O's bash? |