Bad character not at home as a rule (6)
I believe the answer is:
outlaw
'bad character' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'not at home as a rule' is the wordplay.
'not at home' becomes 'out' (out can mean away from home).
'as a rule' becomes 'law' (I am not sure about this - if you are sure you should believe this answer much more).
'out'+'law'='OUTLAW'
Can you help me to learn more?
(Other definitions for outlaw that I've seen before include "Ban, prohibit by legislation" , "Robin Hood figure?" , "Wanted criminal" , "Josey Wales was one" , "Ban - bandit" .)