Wrong indicator? Not good (3)
I believe the answer is:
sin
'wrong' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for sin that I've seen before include "Wrongdoing" , "Depravity" , "Misdeed" , "Lapse against moral law" , "It breaches the moral law" .)