Maple product (3)
I believe the answer is:
sap
'maple product' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sap that I've seen before include "Vital plant juice" , "Internal tree moisture" , "Gradually weaken (a person's strength)" , "Weak foolish person" , "Plant juice; undermine" .)