Happen to be neatly finished and attractive (6)
I believe the answer is:
comely
'attractive' is the definition.
(I've seen this before)
'happen to be neatly finished' is the wordplay.
'happen' becomes 'come' (coming is a kind of happening).
'to be neatly finished' becomes 'ly' (I can't explain this - if you can you should believe this answer much more).
'come'+'ly'='COMELY'
'and' is the link.
Can you help me to learn more?
(Other definitions for comely that I've seen before include "Fair (but not lovely!)" , "Pleasing, graceful" , "Quite good-looking" , "Archaic word for good-looking, say maidens" , "Old word for good-looking, say a lass" .)