Smoothed over for a couple (6)

I believe the answer is:

evened

I'm a little stuck... Click here to teach me more about this clue!

'smoothed' is the definition.
(I've seen this in another clue)

I don't understand how the remainder of the clue works.

(Other definitions for evened that I've seen before include "Made smooth or equalised" , "Made smooth and regular" , "Made level" , "Levelled" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app