Casanova (6,3)
(Other definitions for ladies man that I've seen before include "Rake" , "Philanderer" , "(Would be) seducer of women?" , "Libertine" , "Lothario" .)
'casanova' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for don juan that I've seen before include "Famous seducer" , "Byron work" , "Notorious libertine" , "Male seducer" , "Great lover" .)