She's an American lawyer (3)

I believe the answer is:

ada

'she's' is the definition.

'an american lawyer' is the wordplay.
'an' becomes 'a'.
'american lawyer' becomes 'DA' (abbreviation for District Attorney).
'a'+'da'='ADA'

(Other definitions for ada that I've seen before include "Girl's name, one letter short of a man's name" , "-- Lovelace, pioneer in computing" , "Palindromic girl's name" , "Computer lang.; f. name" , "Computer language; girl's name" .)

I've seen this clue in The Irish Independent.

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