One was impressed by an old typewriter (6,4)
I believe the answer is:
carbon copy
'typewriter' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?
I don't understand how the remainder of the clue works.
(Other definitions for carbon copy that I've seen before include "Something identical" , "Exact replica" , "Wrong" , "Exact duplicate" .)