Marzipan ingredient (6)
I believe the answer is:
almond
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">marzipan ingredient</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for almond that I've seen before include "Yellowish brown" , "Fruit kernel of a peach-related tree" , "Fruit for marzipan" , "Nut often used in cake icing (6)." , "Nut-like kernel" .)