A hostile bang smashed by champion tennis player (6)

I think it could be either:

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6,6

althea

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'champion tennis player' is the definition.
(Althea Gibson, tennis champion and golfer)

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

(Other definitions for althea that I've seen before include "wholesome woman" , "Girl" , "female" .)

I've seen this clue in The Guardian.

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