Good or bad luck (5)
I believe the answer is:
karma
'good or bad luck' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for karma that I've seen before include "Buddhist principle of inevitable consequence" , "moral reckoning" , "Retribution" , "reaping what's sown" , "Lifetime's actions that set fate for next life" .)