Superiority of former monk's accommodation in French church (10)
I believe the answer is:
excellence
'superiority' is the definition.
(excellence is a kind of superiority)
'former monk's accommodation in french church' is the wordplay.
'former' becomes 'ex' (prefix meaning former or onetime).
'monk's accommodation' becomes 'cell' (I can't justify this - if you can you should give a lot more credence to this answer).
'in french' becomes 'en' ('in' in French).
'church' becomes 'CE' (abbreviation for Church of England).
'ex'+'cell'+'en'+'ce'='EXCELLENCE'
'of' is the link.
Can you help me to learn more?
(Other definitions for excellence that I've seen before include "Superiority" , "Ambassadorial" , "Exceptional quality" , "Great merit" , "Outstanding quality" .)