| Clue | Source | Date |
|---|---|---|
| Old stick-in-the-mud (5-5) | ||
| Old stick-in-the-mud | The Telegraph Quick | 16 Feb 2024 |
| Party pooper, perhaps | The Washington Post | 06 Jun 2016 |
| Square | ||
| Square | ||
| Stuffed shirt | ||
| Stuffed shirt | ||
| Old-fashioned fussbudget | ||
| Old-fashioned fussbudget | ||
| Stick-in-the-mud | ||
| Overfastidious one | ||
| A square, like Caspar Milquetoast | ||
| Mossback | ||
| Pernickety one |