"Slippery" tree (3)
I believe the answer is:
elm
'slippery tree' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for elm that I've seen before include "Tree of the genus Ulmus" , "Furniture wood" , "One [TYPE OF TREE]" , "Kind of 19" , "Wood in pelmet" .)