Animal with a speckled coat (4)
I believe the answer is:
roan
'animal with a speckled coat' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for roan that I've seen before include "Reddish-coloured horse" , "Two-colour horse" , "Bay horse with white/grey hairs in its coat" , "(Horse) white-sprinkled coat" , "Horse with a brownish coat sprinkled with grey" .)