Ancient name for Alcoholics Anonymous? (5)

I believe the answer is:

aaron

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'alcoholics anonymous?' is the definition.
I can't judge whether this defines the answer.

'ancient name' is the wordplay.
'ancient' becomes 'aa' (I can't justify this - if you can you should believe this answer much more).
'name' becomes 'ron' (short for Ronald).
'aa'+'ron'='AARON'

'for' acts as a link.

Can you help me to learn more?

(Other definitions for aaron that I've seen before include "OT character" , "Moses's brother" , "- - Copland (mus.)" , "Elder brother of Moses" , "Bearded fellow" .)

I've seen this clue in the Evening Standard.

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