Crossword Genius

In AA to meet drunk individually (3,2,1,4)

Ross

I believe the answer is:

one at a time

'individually' is the definition.
(I've seen this before)

'in aa to meet drunk' is the wordplay.
'drunk' is an anagram indicator.
'in'+'aa'+'to'+'meet'='inaatomeet'
'inaatomeet' with letters rearranged gives 'ONE AT A TIME'.

(Other definitions for one at a time that I've seen before include "Individually" , "A-team, I note, travelling separately" , "Singly" .)

I've seen this clue in The Independent.
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