Auntie got drunk taking advantage of what's in The Bistro (6,3)

I believe the answer is:

eating out

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'advantage of what's in the bistro' is the definition.
I can't tell whether this defines the answer.

'auntie got drunk' is the wordplay.
'drunk' is an anagram indicator.
'auntie'+'got'='auntiegot'
'auntiegot' anagrammed gives 'EATING OUT'.

'taking' acts as a link.

Can you help me to learn more?

(Other definitions for eating out that I've seen before include "Forgoing home cooking" , "Patronising a restaurant" , "Dining in a restaurant" .)

I've seen this clue in The Irish Times.

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