Showing cleric old film studios (9)
I believe the answer is:
revealing
'showing' is the definition.
('reveal' can be a synonym of 'show')
'cleric old film studios' is the wordplay.
I cannot really see how this works, but
'cleric' could be 'rev' (abbreviation for Reverend) and 'rev' is found in the answer.
'film studios' could be 'ealing' (I've seen this before) and 'ealing' is found in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for revealing that I've seen before include "to be telltale" , "Divulging" , "Exposing" , "Giving away" , "Discovering" .)