Working canine (6)

I believe the answer is:

collie

(Other definitions for collie that I've seen before include "Sheep-herding dog" , "Popular sheepdog like Lassie" , "Popular kind of sheepdog" , "Sheepdog wth ling nose and shaggy hair" , "Silky-coated sheepdog" .)

I've seen this clue in The Sun and The Telegraph.

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