MFR
Set to 4 different clues across 7 published puzzles, most often “Producer: Abbr.” — The New York Times, Saturday, 7 April 2007.
3 letters
Every clue on record, most used first
- Producer: Abbr.4 times
The New York Times — Saturday, 7 April 2007
- Dow Chemical, e.g.: Abbr.once
The New York Times — Thursday, 18 March 2010
- Plant owner: Abbr.once
The New York Times — Thursday, 19 May 2005
- Co. with a plantonce
The New York Times — Tuesday, 23 December 2003