Recall past rock group is boring in church (9)
I believe the answer is:
reminisce
'recall past' is the definition.
(to reminisce is to think about the past)
'rock group is boring in church' is the wordplay.
'rock group' becomes 'REM' (REM are a US rock band).
'boring' is an insertion indicator (some letters must 'bore' a hole into other letters).
'church' becomes 'CE' (abbreviation for Church of England).
'in'+'ce'='ince'
'is' put into 'ince' is 'inisce'.
'rem'+'inisce'='REMINISCE'
(Other definitions for reminisce that I've seen before include "Give account of past" , "Recount memories" , "Recall past events" , "Have fond recollections" , "reflect" .)