Jonas as classic hero (5)

I believe the answer is:

jason

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

'hero' is the definition.
(I've seen this before)

'jonas as classic' is the wordplay.
'jonas' can be anagrammed to 'JASON'.
Though, I am not sure how this is indicated.

Can you help me to learn more?

(Other definitions for jason that I've seen before include "Chief Argonaut" , "Greek hero, captain of the Argo" , "He sailed the Argo to find the Golden Fleece" , "Argonaut leader" , "Boy" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.