Reasonably fair (6)
I believe the answer is:
pretty
I believe this is a double definition.
'reasonably' is the first definition.
(I know that reasonably can be written as pretty)
'fair' is the second definition.
(I've seen this before)
(Other definitions for pretty that I've seen before include "Nice to look at" , "Somewhat - attractive" , "Fairly; attractive" , "Lovely" , "Facially attractive" .)