Penance (9)
I believe the answer is:
atonement
'penance' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for atonement that I've seen before include "satisfaction" , "Expiation of sin, penance" , "Compensation for a wrong" , "'Penance, redemption (9)'" , "Reparation (for a wrong)" .)