Spooner's other half meeting old king in confined space (9)
I believe the answer is:
cubbyhole
'confined space' is the definition.
I don't understand the rest of the clue.
(Other definitions for cubbyhole that I've seen before include "Place for keeping bits and bobs" , "Recess to contain miscellaneous objects" , "Small enclosed space or room" , "Small compartment, room space" , "Snug enclosed space" .)