Bird list has to include duck (7)
I believe the answer is:
rooster
'bird' is the definition.
(rooster is a kind of bird)
'list has to include duck' is the wordplay.
'list' becomes 'roster' (a roster is a list or register).
'has' indicates putting letters inside.
'to include duck' becomes 'o' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'roster' placed around 'o' is 'ROOSTER'.
Can you help me to learn more?
(Other definitions for rooster that I've seen before include "male with comb" , "American cock" , "8 [RURAL] alarm call" , "Adult male domestic fowl" , "One may crow" .)