Ceremony sounds correct (4)
I believe the answer is:
rite
'ceremony' is the definition.
(rite is a kind of ceremony)
'sounds correct' is the wordplay.
'sounds' shows a homophone (sound like).
'correct' becomes 'right' (right can mean correct).
'right' sounds like 'RITE'.
(Other definitions for rite that I've seen before include "Solemn ceremony" , "Formal procedure" , "Ceremony, liturgy" , "Tire of ceremony" , "something like mass" .)