Is on the beer with gangster from Spain - a patron of wine bar, for one (3,7)

I believe the answer is:

ale drinker

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'spain a patron of wine bar for one' is the definition.
I can't judge whether this defines the answer.

'is on the beer with gangster from' is the wordplay.
'is on' means one lot of letters go next to another.
'the beer with' becomes 'drinker' (I can't explain this - if you can you should believe this answer much more).
'gangster' becomes 'al' (Al Capone).
'from' becomes 'e' (I've seen this in other clues).
'al'+'e'='ale'
'drinker' after 'ale' is 'ALE DRINKER'.

Can you help me to learn more?

I've seen this clue in the Irish Times (Crosaire) and The Irish Times.

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