Unconcerned with right or wrong (6)
I believe the answer is:
amoral
'unconcerned with right or wrong' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for amoral that I've seen before include "Lacking a sense of right and wrong" , "Unaffected by any sense of right and wrong" , "Unethical" , "Lacking sense of decency" , "Having no code of ethics" .)