Fairly attractive (6)
I believe the answer is:
pretty
I believe this clue is a double definition.
'fairly' is the first definition.
(thesaurus)
'attractive' is the second definition.
(thesaurus)
(Other definitions for pretty that I've seen before include "charming to look at" , "Facially attractive" , "Attractive - quite" , "Somewhat - attractive" , "Pleasing on the eye" .)