Welsh emblem (4)
I believe the answer is:
leek
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">welsh emblem</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 leek that I've seen before include "One of the veggies" , "Vegetable - Welsh symbol" , "what Fluellen wore in France?" , "Cylindrical vegetable" , "Vegetable emblem of Wales" .)