Get retribution for (6)
I believe the answer is:
avenge
'get retribution for' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for avenge that I've seen before include "Exact reparation for a wrong" , "To seek vengeance" , "Retaliate on behalf of" , "Dish out a dose of own medicine" , "Inflict harm in return (for wrong)" .)