Pigsty cry (4)
I believe the answer is:
oink
'pigsty cry' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for oink that I've seen before include "Sow's sound" , "What you get from pen" , "Sound from a sty" , "Sound made by a pig" , "Piggy noise" .)