Setter's perhaps after spicy snacks (3,4)
I believe the answer is:
hot dogs
'snacks' is the definition.
(hot dog is a type of snack)
'setter's perhaps after spicy' is the wordplay.
'setter's perhaps' becomes 'dog's' (setter is a kind of dog).
'after' means one lot of letters go next to another.
'spicy' becomes 'hot' (synonyms).
'dogs' after 'hot' is 'HOT DOGS'.
(Other definitions for hot dogs that I've seen before include "performs tricks in New York" , "Fast food items - sweaty hounds?" .)