Aromatic kernel (6)
I believe the answer is:
nutmeg
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">aromatic kernel</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 nutmeg that I've seen before include "put the ball through" , "Hard, aromatic spice" , "spicy stuff" , "Kick the football between an opponent's legs" , "Variety of spice" .)