Spheres in sight (4)
I believe the answer is:
orbs
I believe this is a double definition.
'spheres' is the first definition.
(orb is a kind of sphere)
'sight' is the second definition.
(I've seen this before)
'in' is the link.
(Other definitions for orbs that I've seen before include "Ball shapes" , "Jewelled spheres" , "Lovely eyes, bros" , "Round objects" , "sight" .)