Said OK, it is a traditional procedure (4)
I believe the answer is:
rite
'a traditional procedure' is the definition.
'rite' can be an answer for 'procedure' (I have seen 'Ceremonial procedure' mean 'rite' so perhaps 'procedure' could also mean 'rite'). I am not sure about the 'a traditional' bit.
'said ok' is the wordplay.
'said' shows a homophone (sound like).
'ok' becomes 'right' (I've seen this in other clues).
'right' sounds like 'RITE'.
'it is' acts as a link.
Can you help me to learn more?
(Other definitions for rite that I've seen before include "Ceremony - ritual" , "Custom" , "Formal procedure" , "Customary observance" , "Mystery - ceremony" .)