Unnatural accommodation? (5)
I believe the answer is:
flats
'unnatural accommodation?' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
This is all the clue.
Can you help me to learn more?
(Other definitions for flats that I've seen before include "Apartments" , "Punctures" , "As opposed to sharps?" .)