Crossword Genius

Toff on revolving stage striking grand’s a dynamite dude (5)

Ross

I think it could be either:

swell

nobel

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

(Other definitions for nobel that I've seen before include "Giver of many prizes" , "Prize guy" , "Prize giver" , "Dynamite inventor, Prize founder" , "Swedish prize-giver" .)

I've seen this clue in The Times and The Sunday Times.
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