Pig's noise (5)
I believe the answer is:
snort
'pig's noise' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for snort that I've seen before include "Derisive noise made through nose" , "Inhale cocaine" , "Noisily express indignation" , "little whisky" , "quick drink" .)