Tennis player in river down under (6)

I believe the answer is:

murray

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'tennis player' is the definition.
(Andy Murray)

I cannot understand how the remainder of the clue works.

(Other definitions for murray that I've seen before include "Sir James ---, first OED editor" , "Australian flower" , "British hope" , "Australian river" , "Andy --, tennis player" .)

I've seen this clue in The Sun.

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