Al Capone’s version? (8)

I believe the answer is:

aluminum

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'al' is the definition.
(chemical symbol of aluminium or 'aluminum' in US)

'capone's version?' is the wordplay.
I cannot quite understand how this works, but
'capone' could be 'al' (gangster Al Capone) and 'al' is found in the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for aluminum that I've seen before include "metal from overseas" , "Light silvery metal, to an American" , "Most abundant metal in the earth's crust" .)

I've seen this clue in The Times.

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