Edible shellfish with a pair of hinged shells (7)

I believe the answer is:

scallop

(Other definitions for scallop that I've seen before include "Seafood - shell" , "Mollusc or lacy edge" , "Shellfish - badge worn by pilgrims to Santiago de Compostela" , "Edible bivalve mollusc" , "Bivalve mollusc with fan-shaped shell" .)

I've seen this clue in The Telegraph.

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