Soup seed (6)
I believe the answer is:
lentil
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">soup seed</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lentil that I've seen before include "Round flat seed" , "Pulse used in soup" , "bit of food" , "Food stuff" , "High-protein pulse" .)