Might be a rush job (10)
I believe the answer is:
wickerwork
'a rush job' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'might be' is the wordplay.
'might' becomes 'wicker' (I can't explain this - if you can you should give a lot more credence to this answer).
'be' becomes 'work' (synonyms).
'wicker'+'work'='WICKERWORK'
Can you help me to learn more?
(Another definition for wickerwork that I've seen is " Basketry".)