Imposed objective, binding for church (8)
I believe the answer is:
enforced
'imposed' is the definition.
('enforce' can be a synonym of 'impose')
'objective binding for church' is the wordplay.
'objective' becomes 'end' (both can mean a purpose).
'binding' means one lot of letters goes inside another.
'church' becomes 'CE' (abbreviation for Church of England).
'for'+'ce'='force'
'end' placed around 'force' is 'ENFORCED'.
(Other definitions for enforced that I've seen before include "Corn feed (anag)" , "Compulsory" , "Ensured observance of rules" , "'Compelled observance of, a law say (8)'" , "Caused laws to be observed" .)