Plant used in cooking (7)
I believe the answer is:
potherb
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">plant used in cooking</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for potherb that I've seen before include "Plant grown for culinary use" , "this for season" , "Useful kitchen plant" , "Plant with leaves used in cooking" , "sage?" .)