Fellow in radio getting beer in (5)

I believe the answer is:

caleb

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'fellow' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'radio getting beer in' is the wordplay.
'radio getting' becomes 'cb' (I can't explain this - if you can you should give a lot more credence to this answer).
'beer' becomes 'ale' (type of beer).
'in' is an insertion indicator.
'cb' enclosing 'ale' is 'CALEB'.

'in' is the link.

Can you help me to learn more?

(Another definition for caleb that I've seen is " Chap".)

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

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