Get better business in advance (4-2,4)

I believe the answer is:

pick-up line

'advance' is the definition.
(advance can mean romantic approach)

'get better business' is the wordplay.
'get better' becomes 'pick up' (pick up can mean to improve or get better).
'business' becomes 'line' (as in someone's line of work).
'pickup'+'line'='PICK-UP LINE'

'in' acts as a link.

I've seen this clue in The Guardian.

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