Made regular eleven edgier to some extent (6)
I believe the answer is:
evened
'made regular' is the definition.
(evening is a kind of making regular)
'eleven edgier to some extent' is the wordplay.
'to some extent' indicates a hidden word.
'EVENED' is hidden in the letters of 'eleven edgier'.
(Other definitions for evened that I've seen before include "Made smooth and regular" , "Levelled" , "Made smooth or equalised" , "Made level" .)