Chicken roll contains nothing (7)
I believe the answer is:
rooster
'chicken' is the definition.
(I know that rooster is a type of chicken)
'roll contains nothing' is the wordplay.
'roll' becomes 'roster' (roll can mean a list or roster).
'contains' indicates putting letters inside.
'nothing' becomes 'O' (looks like zero - 0).
'roster' enclosing 'o' is 'ROOSTER'.
(Other definitions for rooster that I've seen before include "One may crow" , "One crows" , "Morning caller" , "American cock" , "Crowing bird" .)