Caught by unidentified member of the clergy (5)
I believe the answer is:
canon
'member of the clergy' is the definition.
(I've seen this before)
'caught by unidentified' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'by unidentified' becomes 'anon' (I can't justify this - if you can you should give a lot more credence to this answer).
'c'+'anon'='CANON'
Can you help me to learn more?
(Other definitions for canon that I've seen before include "Body of established rules or principles" , "Collection of writing" , "minister?" , "Basic law or principle" , "Churchman" .)