Improves compensation (6)
I believe the answer is:
amends
I believe this clue is a double definition.
'improves' is the first definition.
('amend' can be a synonym of 'improve')
'compensation' is the second definition.
(amends is a kind of compensation)
(Other definitions for amends that I've seen before include "Redress" , "Compensation" , "Makes minor improvements" , "Make these to atone for wrong done" , "Fixes" .)