| Clue | Source | Date |
|---|---|---|
| Male holding nerve, partly in charge of systematising classes | The Times Cryptic | 13 Mar 2025 |
| Relating to taxonomy | ||
| Bono blowing top, heading for Murdoch in cab with note relating to name-calling | The Telegraph Toughie | 27 Jan 2021 |
| The sort of grouping that's not expensive, with duty to replace European Commission | The Telegraph Cryptic | 08 Aug 2018 |
| Of classes |