An inhuman invention (5)
I believe the answer is:
robot
'an inhuman invention' 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?
This is all the clue.
Can you help me to learn more?
(Other definitions for robot that I've seen before include "Mechanical man" , "Factory worker, perhaps" , "programmed servant" , "Unpaid worker" , "Mechanism that can move like a human" .)