Feature about a series (5)
I believe the answer is:
chain
'series' is the definition.
(I know that chain is a type of series)
'feature about a' is the wordplay.
'feature' becomes 'chin' (facial feature).
'about' is an insertion indicator.
'chin' going around 'a' is 'CHAIN'.
(Other definitions for chain that I've seen before include "Paper decoration" , "restraint" , "Series of connected things" , "Series of links; sixty six feet" , "Tie" .)