Stuffed with duck, kipper cooked for snack (4,3)
I believe the answer is:
pork pie
'snack' is the definition.
(pork pie is a type of snack)
'stuffed with duck kipper cooked' is the wordplay.
'stuffed with' indicates putting letters inside (some letters get stuffed inside).
'duck' becomes 'o' (resembles zero - 'duck' in cricket).
'cooked' indicates an anagram (letters cooked into a new form).
'kipper' is an anagram of 'prkpie'.
'o' inserted into 'prkpie' is 'PORK-PIE'.
'for' acts as a link.
(Other definitions for pork pie that I've seen before include "Hat - lie - snack" , "material from Tamworth, say, processed in case" , "One going to the head" , "Untruth - hat - meaty snack" , "that can be eaten!" .)