Bar exchanging tokens for bills (9)

I believe the answer is:

banknotes

'for bills' is the definition.
('banknote' can be a synonym of 'bill')

'bar exchanging tokens' is the wordplay.
'bar' becomes 'ban' (bar can mean to ban or prohibit).
'exchanging' indicates an anagram (I've seen 'exchange' mean this).
'tokens' is an anagram of 'knotes'.
'ban'+'knotes'='BANKNOTES'

(Another definition for banknotes that I've seen is " 1a [money]".)

I've seen this clue in the Sydney Morning Herald.

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