Group employed to take one to the island (6)

I believe the answer is:

staffa

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But I can't explain it at all! Could you help me understand?

(Other definitions for staffa that I've seen before include "small uninhabited island" , "Scottish island" , "Fingal's cave isle" , "Hebridean island: site of Fingal's Cave" , "Hebridean isle" .)

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