Bloke cartwheeled in? Hardly radical (5)

I believe the answer is:

daryl

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'bloke cartwheeled in?' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'hardly radical' is the wordplay.
'DARYL' is hidden back-to-front in amongst the letters.
However, I am unsure how the hidden word is indicated.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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