FETLOCK

Joint just above a horse's hoof — to fleck (anag) (7)

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

• Quick crossword No 16,520 — 2023-04-17 23:00:28
  22A: Projection behind and above a horse's hoof (7)
• Quick crossword No 15,541 — 2020-02-28 00:00:01
  13D: Joint just above a horse's hoof — to fleck (anag) (7)