Soup kitchen? (9)
I believe the answer is:
stockroom
'soup kitchen?' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'soup kitchen?' is the wordplay.
'soup' becomes 'stock' (stock is a kind of soup).
'kitchen?' becomes 'room' (kitchen is a kind of room).
'stock'+'room'='STOCKROOM'
Can you help me to learn more?
(Another definition for stockroom that I've seen is " Where goods are stored".)