Crossword Genius

Legitimate target in hoop-la (4,4)

Ross

I believe the answer is:

fair game

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'legitimate target' is the definition.
(I've seen this in another clue)

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

Can you help me to learn more?

(Other definitions for fair game that I've seen before include "can be justly criticised" , "Fear magi with legitimate target" , "Reasonable target?" , "Acceptable target?" , "person open to criticism" .)

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