Quick to identify debts. Meticulous (10)

I believe the answer is:

fastidious

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'meticulous' is the definition.
(similar in meaning)

'quick to identify debts' is the wordplay.
'quick' becomes 'fast' (similar in meaning).
'to identify' becomes 'id' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'debts' becomes 'IOUs' (promises to pay debts).
'fast'+'id'+'ious'='FASTIDIOUS'

Can you help me to learn more?

(Other definitions for fastidious that I've seen before include "Meticulous" , "Attentive to detail" .)

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

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