Conduct church melody (5)
I believe the answer is:
chair
'conduct' is the definition.
(I've seen this before)
'church melody' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'melody' becomes 'air' ('air' can be a synonym of 'melody').
'ch'+'air'='CHAIR'
(Other definitions for chair that I've seen before include "Lead" , "Official position of authority" , "Head of a university faculty or department" , "Preside, guide meeting" , "Top seat of committee" .)