Film a chicken? (5)
I believe the answer is:
layer
This clue is a double definition.
'film' is the first definition.
(film can mean a thin layer of something)
'a chicken?' is the second definition.
(I know that layer is a type of biddy)
(Other definitions for layer that I've seen before include "course" , "Thickness of material or earth - relay it" , "Tier or thickness - or a hen?" , "Stratum or thickness" , "Stratum, tier" .)