Crossword Genius

Quixotic fellow? (3)

Ross

I believe the answer is:

don

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'fellow?' is the definition.
(both can mean an academic)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for don that I've seen before include "Mafia chief or Spanish title" , "Put on; lecturer" , "- - Giovanni, 26" , "Mafia boss" , "Spanish male title" .)

I've seen this clue in the Evening Standard.
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