Last seen in:
- The Guardian - Quick crossword No 16,564 - Jun 8 2023
- The Telegraph - QUICK CROSSWORD NO: 29,182 - Oct 15 2019
- Newsday.com - Sep 16 2018
- Newsday.com - Feb 12 2017
- USA Today - Feb 20 2014
- The Guardian - Quick crossword No 11,740 - Dec 22 2007
- The Times - Concise - Sunday Times Concise 942 - April 9, 2006
- The Times - Concise - Sunday Times Concise 813 - October 12, 2003
- Universal - Sep 1 2003
Related Clues:
- Biting, as wit
- Alternative to mushrooms?
- LSD, slangily
- What red indicates in litmus tests
- It's been taken for many trips
- Low-pH stuff
- Alkali balancer
- Causing to wear away
- Lemon juice, e.g.
- It is neutralized by alkali
- Biting, scathing
- __ rock
- It turns litmus red
- Caustic and biting
- Substance which turns litmus red