FILTER
Set to 2 different clues across 2 published puzzles, most often “Purification aid” — The New York Times, Wednesday, 20 April 2005.
6 letters
Every clue on record, most used first
- Purification aidonce
The New York Times — Wednesday, 20 April 2005
- Aquarium purifieronce
The New York Times — Monday, 1 December 1997