IMIDE
Set to 2 different clues across 4 published puzzles, most often “Ammonia derivative” — The New York Times, Friday, 2 May 2008.
5 letters
Every clue on record, most used first
- Ammonia derivative3 times
The New York Times — Friday, 2 May 2008
- Ammonia compoundonce
The New York Times — Monday, 9 April 2001