Lawyer's one question to flower girl – drinks? (9)

I believe the answer is:

daiquiris

'drinks?' is the definition.
(daiquiri is a kind of drink)

'lawyer's one question to flower girl' is the wordplay.
'lawyer' becomes 'da' (abbreviation for District Attorney).
'one' becomes 'i' (Roman numeral).
'question' becomes 'qu' (abbreviation).
'to flower girl' becomes 'iris' (I've seen this in other clues).
'da'+'i'+'qu'+'iris'='DAIQUIRIS'

I've seen this clue in The Guardian.

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