A knotty game? (3)

I believe the answer is:

tie

I'm a little stuck... Click here to teach me more about this clue!

'game?' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

(Other definitions for tie that I've seen before include "Accessory" , "restraint" , "Bond; neckwear" , "Bond; draw" , "Neck-cloth" .)

I've seen this clue in the Evening Standard.

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