Drink approved in the church (4)
I believe the answer is:
coke
'drink' is the definition.
(Coke is an example)
'approved in the church' is the wordplay.
'approved' becomes 'ok' (I've seen this in other clues).
'in the' is an insertion indicator.
'church' becomes 'ce' (abbreviation for Church of England).
'ok' put within 'ce' is 'COKE'.
(Other definitions for coke that I've seen before include "Fuel for heating" , "Drink - drug - solid-fuel product" , "Substance left after gas and tar have been extracted from coal" , "A solid fuel; a drug (abbr.)" , "Fuel made from coal" .)