Small compartment (9)
I believe the answer is:
cubbyhole
'small compartment' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for cubbyhole that I've seen before include "Small compartment, room space" , "Place for keeping bits and bobs" , "Small enclosed space or room" , "Snug enclosed space" , "Recess to contain miscellaneous objects" .)