Crossword Genius

Don Quixote's sidekick? (5)

Ross

I believe the answer is:

amigo

I'm a little stuck... Click here to teach me more about this clue!

This might be a double definition.

'don quixote's' is the first definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?

'sidekick?' is the second definition.
(I've seen this in another clue)

Can you help me to learn more?

(Other definitions for amigo that I've seen before include "Spanish word meaning friend" , "Male (Spanish?) friend" , "Friend in Spanish-speaking area" , "buddy abroad?" , "A Spanish pal" .)

I've seen this clue in The Telegraph.
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