Discovering minister at old film studios (9)
I believe the answer is:
revealing
'discovering' is the definition.
('reveal' can be a synonym of 'discover')
'minister at old film studios' is the wordplay.
'minister' becomes 'rev' (short for reverend).
'at' is a charade indicator (letters next to each other).
'old film studios' becomes 'ealing' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'rev'+'ealing'='REVEALING'
Can you help me to learn more?
(Other definitions for revealing that I've seen before include "to be telltale" , "Discovering" , "Giving away" , "Exposing" , "Divulging" .)