Noise made by little one after end of feeding (5)
I believe the answer is:
Here is my best explanation:
'noise' is the definition.
(I've seen this before)
'little one after end of feeding' is the wordplay.
'little one' becomes 'runt' (I've seen this before).
'after' says to put letters next to each other.
'end of' says to take the final letters.
The final letter of 'feeding' is 'g'.
'runt' put after 'g' is 'GRUNT'.
'made by' is the link.
(Other definitions for grunt that I've seen before include "Talk like a pig", "Beastly sound", "(Make the) sound of a pig", "Oink", "Inarticulate sound", "noise", "Noise of a pig ...", "Snort (like a pig)" and "Sound made by a pig".)