One gathering leaves for libertine (4)
I believe the answer is:
rake
'for libertine' is the definition.
(rake is a kind of libertine)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for rake that I've seen before include "Smooth - Lothario" , "set at an angle" , "Gardening tool for the dissolute fellow" , "disreputable fellow" , "Debauched person found in the garden" .)