Probe elected part of church reportedly (7)
I believe the answer is:
inquire
'probe' is the definition.
(thesaurus)
'elected part of church reportedly' is the wordplay.
'elected' becomes 'in'.
'part of church' becomes 'choir' ('choir' is part of 'church').
'reportedly' indicates a 'sounds like' (homophone) clue.
'choir' is a homophone of 'quire'.
'in'+'quire'='INQUIRE'
(Other definitions for inquire that I've seen before include "Ask for information" , "investigation" .)