Air hostess dismisses trio of bands (6)

I believe the answer is:

sashes

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'bands' is the definition.
(sash is a kind of band)

I can't explain the remainder of the clue.

(Other definitions for sashes that I've seen before include "Fabric bands worn around body" , "Ornamental cloth bands me father wore in song?" , "Sliding window frames" , "Ornamental cloths worn by Unionists" , "They're worn by men of 9 down" .)

I've seen this clue in the Irish Times (Crosaire) and the Irish Times.

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