Church more upset over US city service (8)
I believe the answer is:
ceremony
'service' is the definition.
(thesaurus)
'church more upset over us city' is the wordplay.
'church' becomes 'ce' (abbreviation for Church of England).
'upset' indicates anagramming the letters.
'over' indicates putting letters inside.
'us city' becomes 'ny' (I've seen this in other clues**).
'more' with letters rearranged gives 'remo'.
'ce' placed within 'remo' is 'ceremo'.
'ceremo'+'ny'='CEREMONY'
(Other definitions for ceremony that I've seen before include "the formal stand on?" , "Kind of ritual - don't stand on it" , "Event of ritual significance" , "Activity on a solemn occasion" , "Pomp and 6" .)