Edible seaweed (4)
I believe the answer is:
nori
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">edible seaweed</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that nori is a type of edible seaweed)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for nori that I've seen before include "oriental food" , "seaweed" , "Japanese food" .)