Ready to hide every other bit of sunlight (3)
I believe the answer is:
ray
'sunlight' is the definition.
(as in a ray of sunlight)
'ready to hide every other bit' is the wordplay.
'to hide every other bit' means one should take alternating letters.
The alternate letters of 'ready' are 'RAY'.
'of' is the link.
(Other definitions for ray that I've seen before include "Man who engaged in surrealist photography" , "bit of sunshine" , "Man, maybe" , "A bright beam or flat fish" , "Shaft, beam" .)