Seducer reluctant to have a port (8)
I believe the answer is:
lothario
'seducer' is the definition.
(I've seen this before)
'reluctant to have a port' is the wordplay.
'reluctant' becomes 'loth' (if you are loth to do something you are reluctant).
'to have' is a charade indicator (letters next to each other).
'port' becomes 'rio' (Rio de Janeiro is a port).
'loth'+'a'+'rio'='LOTHARIO'
(Other definitions for lothario that I've seen before include "Don Juan-type character" , "Who chases female" , "Seducer, rake" , "Libertine, lady-killer" , "Womaniser, philanderer" .)