Niche; recess (4)
I believe the answer is:
nook
I believe this clue is a double definition.
'niche' is the first definition.
(I've seen this before)
'recess' is the second definition.
(a nook is an architectural recess)
(Other definitions for nook that I've seen before include "Hidey-hole" , "Recess offering seclusion" , "Small space" , "shady retreat" , "cosy retreat" .)