Fairly uniformly (6)
I believe the answer is:
evenly
I believe this clue is a double definition.
'fairly' is the first definition.
(thesaurus)
'uniformly' is the second definition.
(thesaurus)
(Other definitions for evenly that I've seen before include "Smoothly or impartially" , "in regular fashion" , "Material" , "In calm or level manner" , "Smoothly, uniformly" .)