Crossword Genius

A copy sent (3)

Ross

I believe the answer is:

fax

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'a copy' is the definition.
The definition and answer 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?

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for fax that I've seen before include "Electronic transmission" , "Means of communication" , "Transmission of exact copies of documents electronically" , "Modern method of transmitting printed matter by phone" , "Transmit document" .)

I've seen this clue in the Evening Standard.
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