Made level (6)
'made level' is the definition.
('even' can be a synonym of 'make level')
This is all the clue.
(Other definitions for evened that I've seen before include "Made smooth or equalised" , "Levelled" , "Made level" , "Made smooth and regular" .)
'made level' is the definition.
('even out' can be a synonym of 'make level')
This is all the clue.