Rake to agitate small leaves (4)
I believe the answer is:
roue
'rake' is the definition.
(both can mean an immoral man)
'agitate small leaves' is the wordplay.
'agitate' becomes 'rouse' (to rouse is to excite or agitate).
'small' becomes 's' (abbreviation - e.g. clothes size).
'leaves' is a deletion indicator.
'rouse' with 's' taken away is 'ROUE'.
'to' is the link.
(Other definitions for roue that I've seen before include "A dissolute elderly man in France" , "Dissipated man" , "Reckless spender" , "Libertine male" , "Lecherous man" .)