Sailor without sin, but roguish (3)
I believe the answer is:
bad
'roguish' is the definition.
Both the definition and answer are adjectives. Maybe you can see an association between them that I can't see?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for bad that I've seen before include "SECOND HALF OF 16" , "Rotten, evil" , "not healthy" , "Substandard" , "Ill" .)