Radio’s correct form of liturgy (4)
I believe the answer is:
rite
'form of liturgy' is the definition.
(liturgy in a church)
'radio's correct' is the wordplay.
'radio's' indicates a 'sounds like' (homophone) clue.
'correct' becomes 'right' (right can mean correct).
'right' is a homophone of 'RITE'.
(Other definitions for rite that I've seen before include "Custom" , "Religious ceremonial sounds correct" , "something like mass" , "Solemn ceremony" , "Mystery - ceremony" .)