Foreign spy ring confiscates church film (6)
I believe the answer is:
psycho
'film' is the definition.
(Alfred Hitchcock film)
'foreign spy ring confiscates church' is the wordplay.
'foreign' indicates anagramming the letters (foreign order of the letters).
'ring' becomes 'o' (letter resembling a ring).
'confiscates' is an insertion indicator.
'church' becomes 'ch' (common abbreviation).
'spy' anagrammed gives 'psy'.
'psy'+'o'='psyo'
'psyo' enclosing 'ch' is 'PSYCHO'.
(Other definitions for psycho that I've seen before include "Chopsy (anag.)" , "Norman Bates's film" , "1960 horror film" , "Method of treatment pioneered by Freud" , "Famous Hitchcock film about man with mental disorder" .)