Half-finished rudimentary accommodation (4)
I believe the answer is:
shed
'rudimentary accommodation' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
'half-finished' is the wordplay.
'half' means to take half the letters.
'finished' halved is 'SHED'.
Can you help me to learn more?
(Other definitions for shed that I've seen before include "Abandoned" , "place for bikes" , "Garden feature" , "Discarded" , "Discard (something)" .)