Pungent Japanese root (6)
I believe the answer is:
wasabi
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pungent japanese root</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for wasabi that I've seen before include "Pungent green root used in Japanese cookery" , "Hot Japanese paste" , "Pungent green paste used in Japanese cuisine" , "Japanese horseradish" , "Pungent green root, used in Japanese cooking" .)