Chicken and duck in resort cooked (7)
I believe the answer is:
rooster
'chicken' is the definition.
(I know that Rooster is a type of chicken)
'duck in resort cooked' is the wordplay.
'duck' becomes 'o' (resembles zero - 'duck' in cricket).
'in' is an insertion indicator.
'cooked' indicates anagramming the letters (letters cooked into a new form).
'resort' is an anagram of 'roster'.
'o' put into 'roster' is 'ROOSTER'.
'and' acts as a link.
(Other definitions for rooster that I've seen before include "male with comb" , "One may crow" , "Early-morning caller" , "Farmyard fowl" , "Toreros (anag.)" .)