Seducer (8)
I believe the answer is:
lothario
'seducer' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for lothario that I've seen before include "Heartbreaker" , "Womaniser, philanderer" , "Gay seducer" , "A literary libertine or womaniser" , "Libertine or woman-chaser" .)