Delightfully pretty or dainty (4)
I believe the answer is:
cute
I believe this clue is a double definition.
'delightfully pretty' is the first definition.
(I've seen this before)
'dainty' is the second definition.
(I've seen this before)
(Other definitions for cute that I've seen before include "Quaintly pleasing" , "Fly" , "Pretty and attractive" , "Smart" , "Small and attractive - cunning" .)