Debtor's entry of French piece (5)

I believe the answer is:

debit

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'debtor's entry' is the definition.
'debit' can be an answer for 'entry' (debit is a kind of entry). I'm not sure about the 'debtor's' bit.

'of french piece' is the wordplay.
'of french' becomes 'de' ('of' in French).
'piece' becomes 'bit' (synonyms).
'de'+'bit'='DEBIT'

Can you help me to learn more?

(Other definitions for debit that I've seen before include "Payment made or owed" , "Opposite of credit" , "Deduct from account" , "Accounting entry showing amount spent" , "Remove (money) from account" .)

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

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