Hide space where coats are kept (9)
I believe the answer is:
cloakroom
'where coats are kept' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'hide space' is the wordplay.
'hide' becomes 'cloak' (I've seen this in another clue).
'space' becomes 'room' (enough space or room to do something).
'cloak'+'room'='CLOAKROOM'
Can you help me to learn more?
(Other definitions for cloakroom that I've seen before include "Room for outer garments" , "In which coats are left, temporarily" , "Place to leave hats and coats" , "Euphemism for lavatory" .)