Filed from 2 published puzzles

ACETYLENE

Set to 2 different clues across 2 published puzzles, most often “Welding gas” — The New York Times, Sunday, 27 May 2001.

9 letters

Every clue on record, most used first

  • Welding gasonce

    The New York Times — Sunday, 27 May 2001

  • Torch fuelonce

    The New York Times — Saturday, 21 September 1996