Cross-country runner, one of Scotland's fastest (4)

I believe the answer is:

spey

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If this is the answer, I'm afraid I cannot explain it.

(Other definitions for spey that I've seen before include "Aviemore river" , "Scottish river, important for salmon fishing and whisky" , "Salmon fishing river flowing into the Moray Firth" .)

I've seen this clue in the Evening Standard.

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