FIRKIN

Small wooden barrel (6)

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

• Quick crossword No 16,238 — 2022-05-23 23:00:48
  2D: Nine imperial gallons (of beer?) (6)
• Quick crossword No 15,904 — 2021-04-27 23:00:18
  15A: Cask for liquids, butter, salt or fish (6)
• Quick crossword No 15,388 — 2019-09-01 23:00:34
  12A: Small wooden barrel (6)