ROAN

Horse with reddish-brown coat (4)

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

• Quick crossword No 16,243 — 2022-05-29 23:00:12
  16A: Horse with, say, a chestnut coat mixed with white (4)
• Quick crossword No 15,314 — 2019-06-06 23:00:46
  2D: Horse with reddish-brown coat (4)