Type of mollusc (7)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">type of mollusc</span>' is the definition.<br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for bivalve that I've seen before include "Eg, oyster or mussel" , "Oyster, perhaps" , "Shellfish with hinged double shell" , "Mollusc with two shells" .)
(Other definitions for limpet that I've seen before include "he's not easily got rid of" , "Shellfish that sticks to surface" , "Proverbially clinging shellfish" , "Cinging mollusc" , "Shellfish; type of mine" .)