Crossword Genius

Individual in Greece: person with no future (5)

Ross

I think it could be either:

vegan

goner

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But I've got no explanation for this one! Could you help me understand?

(Other definitions for goner that I've seen before include "one with no life left" , "Hopeless case" , "Doomed person" , "person about to depart" , "He's unlikely to recover" .)

I've seen this clue in The Telegraph and The Sun.
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