Cosy corner (4)
I believe the answer is:
nook
'cosy corner' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for nook that I've seen before include "Cranny or niche" , "Secluded corner" , "Sheltered corner" , "Recess offering seclusion" , "Hidey-hole" .)