Chancel feature to change we hear (5)
I believe the answer is:
altar
'chancel feature' is the definition.
(I've seen this in another clue)
'change we hear' is the wordplay.
'change' becomes 'alter' (synonyms).
'we hear' indicates a 'sounds like' (homophone) clue.
'alter' sounds like 'ALTAR'.
'to' acts as a link.
(Other definitions for altar that I've seen before include "Site of worship" , "Sacrifical stone sounds as if it will change" , "Kind of table for religious ceremonies" , "Focus of religious activity" , "Focus of church worship" .)