Chicken film (5)
I believe the answer is:
layer
I believe this is a double definition.
'chicken' is the first definition.
(I know that layer is a type of biddy)
'film' is the second definition.
(film can mean a thin layer of something)
(Other definitions for layer that I've seen before include "course" , "Stratum; chicken" , "Seam" , "Stratum or thickness" , "One who does the setting" .)