Rather good-looking (6)

I believe the answer is:
pretty
I believe this is a double definition.
'rather' is the first definition.
('pretty' can be a synonym of 'rather')
'good-looking' is the second definition.
(thesaurus)
(Other definitions for pretty that I've seen before include "Fairly; appealing" , "Fair - fairly" , "chocolate-box" , "Film with Julia Roberts (belle)" , "See 19" .)