Hammer record for money? (5,4)

I believe the answer is:

pound note

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'hammer' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'record for money?' is the wordplay.
'record' becomes 'note' (note can mean to record or notate).
'for' says to put letters next to each other (I've seen this in other clues).
'money?' becomes 'pound' (pound sterling).
'note' put after 'pound' is 'POUND NOTE'.

Can you help me to learn more?

I've seen this clue in The Irish Times.

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