Sport which the mob runs (7)

I believe the answer is:

rackets

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'runs' is the definition.
The definition and answer can be both acts as well as being plural nouns.
Maybe they are linked in a way I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for rackets that I've seen before include "Court game" , "Organised crime" , "rows" , "illegal activities" , "Walled-court ball game" .)

I've seen this clue in The Guardian.

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