Scoundrel found in southern port? (5)
I believe the answer is:
swine
'scoundrel' is the definition.
'southern port?' is the wordplay.
'southern' becomes 's' (abbreviation).
'port?' becomes 'wine' (port is a kind of wine).
's'+'wine'='SWINE'
'found in' is the link.
(Other definitions for swine that I've seen before include "Pig, pigs" , "Nasty people" , "See 9" , "cad" , "Archaic pigs, Gadarene in Bible" .)