Crossword Genius

Extreme characters from Athens? (5,3,5)

Ross

I believe the answer is:

alpha and omega

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

This could be a double definition.

'extreme' is the first definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

'characters from athens?' is the second definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

Can you help me to learn more?

(Other definitions for alpha and omega that I've seen before include "The beginning and end (of the matter)" , "used to describe the deity" , "Extremist characters in Athens" , "identifying with God?" , "Two extremists literally" .)

I've seen this clue in The Guardian.
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