| Clue | Source | Date |
|---|---|---|
| Toxic irritant liquid occurring in plants such as poison ivy and the lacquer tree, causing contact dermatitis in most people (8) | ||
| Oily liquid that is the main constituent of Japanese lacquer | The Telegraph General Knowledge | 14 Oct 2019 |
| Irritant in poison ivy | ||
| Irritant in poison ivy | ||
| Irritant in poison ivy |