HALAL

Set to 2 different clues across 2 published puzzles, most often “Islamic equivalent of kosher” — The New York Times, Tuesday, 3 March 2009.

5 letters

Every clue on record, most used first

Islamic equivalent of kosheronce
The New York Times — Tuesday, 3 March 2009
Judaism : kosher :: Islam : ___once
The New York Times — Sunday, 1 February 2004