Cry of a donkey (4)
I believe the answer is:
bray
'cry of a donkey' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for bray that I've seen before include "Donkey's sound" , "Ass's cry" , "where musical vicar lived" , "Berkshire village with a 16th-century vicar celebrated in legend and song" , "The Vicar of --; heehaw" .)