What choirs do, covering eg Scarborough Fair (8)

I believe the answer is:

sporting

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'fair' is the definition.
(I know that sporting is a more specific form of the attribute fair)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for sporting that I've seen before include "Diver's point of departure" , "Fair (chance)" , "Fair and generous" , "game" , "Able to take defeats in good part" .)

I've seen this clue in The Times.

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