Pungent salad root (6)
I believe the answer is:
radish
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pungent salad root</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for radish that I've seen before include "Hard vegetable" , "3 down" , "Edible small root" , "Sir had this vegetable" , "Root eaten raw in salads" .)