Animals coming round devour assorted food (4,8)
I believe the answer is:
hors doeuvres
'food' is the definition.
(I've seen this before)
'animals coming round devour assorted' is the wordplay.
'animals' becomes 'horses' (I have seen 'Domesticated animals' mean 'horses' so perhaps 'animals' could also mean 'horses').
'coming round' is an insertion indicator.
'assorted' is an anagram indicator.
'devour' with letters rearranged gives 'doeuvr'.
'horses' going around 'doeuvr' is 'HORS DOEUVRES'.
(Other definitions for hors doeuvres that I've seen before include "Antipasto" , "Food" .)