With strange accent, Lou may obliterate all record (6,3)

I believe the answer is:

cancel out

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'obliterate all record' is the definition.

'with strange accent lou' is the wordplay.
'accent lou' can be anagrammed to 'CANCEL OUT'.
However, I'm unsure how this is indicated.

'may' is the link.

Can you help me to learn more?

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

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