Accent of second-rate villain? (6)
I believe the answer is:
brogue
'accent' is the definition.
(thesaurus)
'second-rate villain?' is the wordplay.
'second rate' becomes 'b'.
'villain?' becomes 'rogue' (rogue is a kind of villain).
'b'+'rogue'='BROGUE'
'of' is the link.
(Other definitions for brogue that I've seen before include "Thick and heavy shoe" , "Footprint could be left by this" , "Strong outdoor shoe" , "Style of shoe - style of accent" , "Worn" .)