Good to break rake, a rotten sort (5)
I believe the answer is:
rogue
'a rotten sort' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'good to break rake' is the wordplay.
'good' becomes 'g' (abbreviation).
'to break' indicates putting letters inside.
'rake' becomes 'roue' (both can mean an immoral man).
'g' placed inside 'roue' is 'ROGUE'.
Can you help me to learn more?
(Other definitions for rogue that I've seen before include "One dishonest" , "Bad guy" , "Scally" , "Rapscallion" , "Scallywag" .)