Noise coming from good little piggy? (5)
I believe the answer is:
grunt
'noise' is the definition.
(I've seen this before)
'good little piggy?' is the wordplay.
'good little' becomes 'g' (abbreviation for good).
'piggy?' becomes 'runt' (I have seen 'little piggy' mean 'runt' so perhaps 'piggy' could also mean 'runt').
'g'+'runt'='GRUNT'
'coming from' acts as a link.
(Other definitions for grunt that I've seen before include "Sound made by a pig" , "Snort (like a pig)" , "Beastly sound" , "Talk like a pig" , "(Make the) sound of a pig" .)