NIHILO

Set to 2 different clues across 3 published puzzles, most often “Ex ___ (from nothing)” — The New York Times, Sunday, 14 March 2004.

6 letters

Every clue on record, most used first

Ex ___ (from nothing)2 times
The New York Times — Sunday, 14 March 2004
Creatio ex ___ (Christian tenet)once
The New York Times — Sunday, 26 August 2007