| Clue | Source | Date |
|---|---|---|
| Vent near a volcano upsetting for a mule (8) | ||
| Smoker deciphering formulae (8) | ||
| Smoker deciphering formulae | The Guardian Cryptic | 08 Jan 2024 |
| Gap in the earth's surface from which volcanic gasses such as 5/16 are released | The Guardian Weekend | 23 Jul 2022 |
| Volcanic vent | The Times Concise | 19 Apr 2020 |
| Dirty flue or a chimney, essentially a smoky vent | ||
| Hole emitting gases in a volcanic region | The Telegraph General Knowledge | 11 Feb 2018 |
| Volcanic hole |