Cranny's cousin (4)
I believe the answer is:
nook
'cranny's cousin' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nook that I've seen before include "Secluded recess" , "Recess or cranny" , "Comfy corner" , "Hidey-hole" , "Interior angle formed where two walls meet" .)