ACETYL
Set to 3 different clues across 4 published puzzles, most often “Vinegar radical” — The New York Times, Thursday, 3 February 2000.
6 letters
Every clue on record, most used first
- Vinegar radical2 times
The New York Times — Thursday, 3 February 2000
- ___ group, in organic chemistryonce
The New York Times — Sunday, 3 May 2009
- ___ radicalonce
The New York Times — Sunday, 20 September 1998