Last seen in:
- The Times - Concise - Times Concise Jumbo No 1606
- The Times - Concise - Times Concise Jumbo No 1606
- The Telegraph - QUICK CROSSWORD NO: 29,783 - Sep 17 2021
- The Telegraph - QUICK CROSSWORD NO: 29,635 - Mar 29 2021
- The Times - Concise - Times Concise No 8478
- The Times - Concise - Times Concise No 8277
- The Sun - Two Speed - Oct 2 2019
- The Times - Concise - Times Concise No 8063
- The Washington Post - Jun 2 2019
- L.A. Times Daily - Jun 2 2019
Related Clues:
- Dangerous seepage
- Rare gas
- Metal that may ignite if scratched
- Poisonous gas
- Heaviest of the noble gases
- Northwest Territories Port
- Gas of concern to homeowners
- Fissionable material
- Dangerous household gas
- Heaviest natural element
- Element tested for in home inspections
- Metal that's an effective radiation shield
- Element found in uranium ore
- A 33 Across
- Unwelcome house gas