Church submits before uprising (6)
I believe the answer is:
putsch
'uprising' is the definition.
(I have seen 'Revolutionary uprising' mean 'putsch' so perhaps 'uprising' could also mean 'putsch')
'church submits before' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'submits' becomes 'puts'.
'before' is a charade indicator (letters next to each other).
'ch' after 'puts' is 'PUTSCH'.
(Other definitions for putsch that I've seen before include "A sudden political rebellion" , "Change of government by force" , "Sudden illegal acquisition of power" , "Violent attempt to seize power" , "A sudden political uprising" .)