Paper thrown at weddings (8)
I believe the answer is:
confetti
'paper thrown at weddings' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for confetti that I've seen before include "Bits of paper scattered at festive occasions" , "Celebratory scraps of coloured paper thrown at weddings" , "Small bits thrown over bride and groom" , "Bits thrown at weddings" , "Bits thrown over newly-weds" .)