Stand up again when hearing wedding, say (4)
I believe the answer is:
rite
'wedding say' is the definition.
(wedding is a kind of rite)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for rite that I've seen before include "Solemn ceremony" , "Tire of ceremony" , "Ceremonial act" , "Mystery - ceremony" , "(Words used in) ceremonial" .)