Pleasant to look at; attractive (4,2,3,3)
I believe the answer is:
easy on the eye
I believe this clue is a double definition.
'pleasant to look at' is the first definition.
(I've seen this before)
'attractive' is the second definition.
(I've seen this before)
(Other definitions for easy on the eye that I've seen before include "Nice to look at" , "Pretty" , "Attractive" , "Visually pleasing" , "Good to look at" .)