Tree resin extracted from lime leaning to the west (5)
I believe the answer is:
elemi
'tree resin' is the definition.
(I've seen this before)
'extracted from lime leaning to the west' is the wordplay.
'extracted from' says the answer is hidden in the clue.
'to the west' is a reversal indicator (letters written right to left or 'east to west').
'imele' can be found hidden inside 'lime leaning'.
'imele' reversed gives 'ELEMI'.
(Other definitions for elemi that I've seen before include "Fragrant resin used as incense - Emile (anag)" , "aromatic resin" , "Extract" , "Fragrant tree resin used as incense - I'm Lee (anag)" , "Tree resin; ie, elm (anag.)" .)