Crossword Genius

Dodgy account receiving 1000 yen sparks defiance (9)

Ross

I believe the answer is:

contumacy

I'm a little stuck... Click here to teach me more about this clue!

'defiance' is the definition.
(thesaurus)

'dodgy account receiving 1000 yen' is the wordplay.
I cannot quite understand how this works, but
'account' could be 'ac' and 'ac' is present in the answer.
'1000' could be 'm' (synonyms) and 'm' is located in the answer.
'yen' could be 'y' and 'y' is located in the answer.
This explanation may well be incorrect...

'sparks' is the link.

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I've seen this clue in The Times.
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