Rioting, alcohol-fuelled, over birds (14)

I believe the answer is:

ornithological

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'rioting alcohol-fuelled over birds' is the definition.
I can't tell whether this definition defines the answer.

'rioting alcohol-fuelled over birds' is the wordplay.
'rioting alcohol' can be anagrammed to 'ORNITHOLOGICAL'.
Though, I am unsure how this is indicated.

Can you help me to learn more?

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

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