Aromatic gum resin (12)
I believe the answer is:
frankincense
'aromatic gum resin' is the definition.
(I've seen this before)
This is all the clue.
(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" .)