CLEANAIR
Set to 3 different clues across 3 published puzzles, most often “Environmentalists' cause” — The New York Times, Thursday, 15 June 2006.
8 letters
Every clue on record, most used first
- Environmentalists' causeonce
The New York Times — Thursday, 15 June 2006
- Environmental concernonce
The New York Times — Thursday, 15 May 2003
- Kind of act passed in 1970once
The New York Times — Thursday, 20 May 1999