Pleasantly unreal (6)
I believe the answer is:
dreamy
'pleasantly unreal' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for dreamy that I've seen before include "Pleasantly unreal, very attractive (colloq.)" , "Gorgeous (informal)" , "Misty" , "Fantastic" , "Dishy" .)