Having enlisted help, workers mean to turn old handle (6,4)

I believe the answer is:

maiden name

'old handle' is the definition.

'having enlisted help workers mean to turn' is the wordplay.
'having enlisted' means one lot of letters goes inside another.
'help' becomes 'aid' (synonyms).
'workers' becomes 'men' (men can mean staff or employees).
'to turn' is an anagram indicator.
'aid' placed inside 'men' is 'maiden'.
'mean' anagrammed gives 'name'.
'maiden'+'name'='MAIDEN NAME'

(Another definition for maiden name that I've seen is " former title".)

I've seen this clue in The Independent.

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