Libertine one gathering leaves (4)
I believe the answer is:
rake
'libertine' is the definition.
(rake is a kind of libertine)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for rake that I've seen before include "Playboy" , "One with teeth" , "this to smooth the way?" , "Stage's sloping angle" , "Dissipated type; garden implement" .)