Great boxer from Australia (3)

I believe the answer is:

ali

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'great boxer' is the definition.
'Ali' can be an answer for 'boxer' (Muhammad Ali). I am not sure about the 'great' bit.

'from australia' is the wordplay.
'from' says the answer is hidden in the clue.
'ALI' can be found hidden inside 'australia'.

Can you help me to learn more?

(Other definitions for ali that I've seen before include "Muhammad ___ (or MacGraw?)" , "Muslim name" , "Mohammed . . . (boxer)" , "Person" , "Old fighter" .)

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