Crossword Genius

Chalked up to flouting doctrine (2,6)

Ross

I believe the answer is:

on credit

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

'chalked up' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'flouting doctrine' is the wordplay.
'doctrine' can be anagrammed to 'ON CREDIT'.
But, I'm unsure how the anagram is indicated.

'to' acts as a link.

Can you help me to learn more?

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