Recess, niche (6)
I believe the answer is:
alcove
I believe this is a double definition.
'recess' is the first definition.
(I know that alcove is a type of recess)
'niche' is the second definition.
(alcove is a kind of niche)
(Other definitions for alcove that I've seen before include "Recessed area" , "A small recess or niche" , "Small opening - a clove (anag)" , "private part?" , "Small recess in a larger room" .)