The 'dash' needed in a singular game! (4)

I believe the answer is:

dart

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

I cannot understand how the remainder of the clue works.

(Other definitions for dart that I've seen before include "Small narrow pointed missile" , "Run suddenly" , "shift fast" , "Slender pointed missile" , "Seasoned beef" .)

I've seen this clue in the Evening Standard.

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