Prominent donkey features (4)
I believe the answer is:
ears
'prominent donkey features' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ears that I've seen before include "Lugholes" , "One's hearing aids" , "Sense organs" , "''He who has ... to hear, let him hear'' (bible)" , "Auditors" .)