Rectifies (6)
I believe the answer is:
amends
'rectifies' is the definition.
('amend' can be a synonym of 'rectify')
This is all the clue.
(Other definitions for amends that I've seen before include "It is made in reparation" , "They're made to compensate" , "Make these to atone for injuries or loss caused" , "Redress" , "Makes changes, to a text say" .)