Ritual correct it's said (4)
I believe the answer is:
rite
'ritual' is the definition.
(I know that ritual can be written as rite)
'correct it's said' is the wordplay.
'correct' becomes 'right' (right can mean correct).
'it's said' indicates a 'sounds like' (homophone) clue.
'right' sounds like 'RITE'.
(Other definitions for rite that I've seen before include "(Words used in) ceremonial" , "Custom" , "Tire of ceremony" , "Tries awkwardly to perform rituals" , "Ceremonial procedure" .)