| Clue | Source | Date |
|---|---|---|
| Tree expert died meaning to eat last Rolo | ||
| Someone who studies trees | The Times Specialist Sunday | 10 Sep 2023 |
| Tree scientist | The Times Concise | 18 Feb 2022 |
| Good tendrils could excite this type of plant expert | The Telegraph Toughie | 20 Mar 2019 |