| Clue | Source | Date |
|---|---|---|
| One playing in bold team, never going to lose (11) | ||
| Unflinching Catholic dignitary holding up in current board | The Times Cryptic | 25 Oct 2023 |
| Impossible to subdue | The Telegraph Quick | 12 Aug 2017 |
| Book in revised Milton idea impossible to beat | The Times Cryptic | 07 Sep 2016 |
| Unyielding | ||
| Tenacious | ||
| Not easily discouraged | ||
| Unyielding |