Crossword Genius

Dire Aussie clubs beset by responsibility (5)

Ross

I believe the answer is:

oncus

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

'dire aussie' is the definition.
'oncus' can be an answer for 'aussie' (I have seen 'Bad Aussie' mean 'oncus' so perhaps 'aussie' could also mean 'oncus'). I'm not sure about the 'dire' bit.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Another definition for oncus that I've seen is " Bad Aussie".)

I've seen this clue in The Sunday Times and The Times.
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