One pin in nine (7)

I believe the answer is:

skittle

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'one pin' is the definition.
(skittle is a kind of pin)

I don't understand how the rest of the clue works.

(Other definitions for skittle that I've seen before include "Pin in ninepins" , "Ninepin" , "one keeps getting knocked down" , "Pin to be knocked down" , "one gets bowled over" .)

I've seen this clue in the Evening Standard.

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