| Clue | Source | Date |
|---|---|---|
| Measure of the level of success in achieving some goal (13) | ||
| Echo with very loud TV's nice: see fantastic power? | ||
| Ability to produce a result | Family Time | 08 Mar 2020 |
| Capability | The Telegraph Quick | 06 Nov 2019 |
| Note very loud Scene VI set out to provide potency | The Telegraph Cryptic | 24 Sep 2015 |