Crossword Genius

Written, perhaps, by a non-U deputy (5)

Ross

I believe the answer is:

typed

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'written' is the definition.
(typing is a kind of writing)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for typed that I've seen before include "Written on a keyboard" , "neatly presented?" .)

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