SPIGOT

Cask stopper (6)

Solution has appeared in 2 crosswords (2 across and 0 down):

• Quick crossword No 15,749 — 2020-10-28 00:00:28
  13A: Tap in a bunghole — GI's top (anag) (6)
• Quick crossword No 15,368 — 2019-08-08 23:00:37
  15A: Cask stopper (6)