Oversee church broadcast (5)
I believe the answer is:
chair
'oversee' is the definition.
(thesaurus)
'church broadcast' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'broadcast' becomes 'air' (to air on TV).
'ch'+'air'='CHAIR'
(Other definitions for chair that I've seen before include "Lead" , "See 4" , "control meeting" , "Professorship" , "Seat for one person" .)