Possible Clues:

• Tree that's a different tree if you cut off its trunk
• With 8 Down, yuletide purchase
• Turns up, spice mix lacks a note that's fragrant
• Fragrant ointment
• Oily resinous plant substance
• It's soothing to get up to the laboratory with Samuel
• ____ Fir ( New Brunswick's tree)
• It can be got from tree, primarily medicinal
• Fragrant resin used in medicine and perfumes
• Christmasy candle scent