Argumentative sportsperson? (5)

I believe the answer is:

rower

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'sportsperson?' is the definition.
(I know that rower is a type of sportsperson)

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

Can you help me to learn more?

(Other definitions for rower that I've seen before include "Oarsman/oarswoman" , "Might one argue" , "Oarsman/woman" , "One in eight, perhaps" , "Perhaps stroke" .)

I've seen this clue in The Mirror.

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