SIGH

Release a long breath (4)

Solution has appeared in 3 crosswords (1 across and 2 down):

• Quick crossword No 16,648 — 2023-09-13 23:00:12
  21D: Expression of weariness (4)
• Quick crossword No 16,173 — 2022-03-09 00:00:17
  14D: Heaving sound, usually made with shoulders moving (4)
• Quick crossword No 15,366 — 2019-08-06 23:00:33
  1A: Release a long breath (4)