Baddy, ruddy twisted inside (5)
I believe the answer is:
rogue
'baddy' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
(Other definitions for rogue that I've seen before include "Dishonest man" , "one behaving atypically" , "One dishonest" , "Chap in gallery" , "Baddie" .)