Aussie fool in Colombo gangster group? (5)

I believe the answer is:

bogan

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'aussie fool' is the definition.
The definition suggests a singular noun which matches the answer.

'in colombo gangster group?' is the wordplay.
'in' says the answer is hidden in the clue.
'BOGAN' can be found hidden inside 'colombo gangster group'.

Can you help me to learn more?

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

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