Seducer finding harlot dancing before ten (8)
I believe the answer is:
lothario
'seducer' is the definition.
(thesaurus)
'harlot dancing before ten' is the wordplay.
'dancing' indicates anagramming the letters.
'before' says to put letters next to each other.
'ten' becomes 'io'.
'harlot' anagrammed gives 'lothar'.
'lothar'+'io'='LOTHARIO'
'finding' is the link.
(Other definitions for lothario that I've seen before include "A Gay libertine" , "Heartbreaker" , "Gay seducer" , "Seducer, rake" , "Libertine, lady-killer" .)