Sweet, pretty (6)
I believe the answer is:
lovely
This clue is a double definition.
'sweet' is the first definition.
(thesaurus)
'pretty' is the second definition.
(thesaurus)
(Other definitions for lovely that I've seen before include "Beautiful or delightful" , "Beautiful (like money tendered in shop?)" , "Fair" , "Adorable" , "Volley (anag.)" .)