One playing two legs? (6)

I believe the answer is:

eleven

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'legs?' is the definition.
(eleven is 'legs eleven' in the game bingo)

I don't understand the remainder of the clue.

(Other definitions for eleven that I've seen before include "Late" , "Odd number for a team" , "XI as Roman numeral" , "Number killed in the Peterloo massacre" , "'Legs' bingo number" .)

I've seen this clue in the Evening Standard.

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