Molluscs with wavy-edged shells (8)
I believe the answer is:
scallops
'molluscs with wavy-edged shells' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for scallops that I've seen before include "Curves forming a wavy edge" , "Seafood" , "Molluscs with wavy-edged shells" , "Edible molluscs" , "Tasty shellfish or ornamental curved edgings" .)