| Clue | Source | Date |
|---|---|---|
| One's utmost | ||
| One's utmost to get even? (5,4) | ||
| One's utmost to get on an equal footing with the champion (5,4) | ||
| Maximum effort | Newsday | 01 May 2022 |
| Supreme effort | LA Times Daily | 06 Sep 2020 |
| Supreme effort | The Washington Post | 06 Sep 2020 |
| 100% effort | USA Today | 21 Mar 2019 |
| 100% effort | ||
| Stable of the highest quality produced 100 per cent effort | Irish Times Crosaire | 21 Dec 2017 |
| Utmost effort | USA Today | 23 Jul 2017 |
| 100 percent effort | USA Today | 16 Jul 2017 |
| Utmost effort | ||
| 100 percent effort | ||
| Utmost effort | LA Times Daily | 22 Nov 2016 |
| Utmost effort | ||
| 100% effort | ||
| Maximum effort | ||
| Maximum effort | ||
| Maximum effort | ||
| Utmost effort |