ETHER

Highly flammable liquid once used as an anaesthetic (5)

Solution has appeared in 5 crosswords (2 across and 3 down):

• Quick crossword No 16,685 — 2023-10-26 23:00:29
  18A: Old anaesthetic (5)
• Quick crossword No 16,579 — 2023-06-25 23:00:49
  13A: Liquid once used to produce anaesthetic vapour (5)
• Quick crossword No 16,029 — 2021-09-20 23:00:25
  2D: Early anaesthetic (5)
• Quick crossword No 15,617 — 2020-05-26 23:00:14
  16D: Old anaesthetic — three (anag) (5)
• Quick crossword No 15,179 — 2019-01-01 00:00:04
  5D: Highly flammable liquid once used as an anaesthetic (5)