Aromatic gum resin (12)
I believe the answer is:
frankincense
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">aromatic gum resin</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 frankincense that I've seen before include "One of three wise men's gifts" , "Gift of one of the Magi" , "Aromatic gum resin - an original Christmas present!" , "present at birth" , "Birthday gift" .)