Pursue fortune - it's unlikely to be found in this! (4-6)

I believe the answer is:

wage-packet

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'unlikely to be found in this' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'pursue fortune' is the wordplay.
'pursue' becomes 'wage' (I've seen this before).
'fortune' becomes 'packet' (I can't explain this - if you can you should give a lot more credence to this answer).
'wage'+'packet'='WAGE-PACKET'

'it's' acts as a link.

Can you help me to learn more?

I've seen this clue in The Irish Times.

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