Consumables minus bacon and shellfish (6)

I believe the answer is:

mussel

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'shellfish' is the definition.
(mussel is a kind of shellfish)

I don't understand the rest of the clue.

(Other definitions for mussel that I've seen before include "Shellfish sounds like part of the body" , "Edible marine mollusc sold by Molly Malone - not the cockle" , "finds power in sound" , "Seafood item" , "Type of shellfish" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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