Seven dancing castaways? (5)

I believe the answer is:

veils

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'seven dancing castaways?' is the definition.
Although both the answer and definition are plural nouns, I can't understand how they can define each other.

This is all the clue.

Can you help me to learn more?

(Other definitions for veils that I've seen before include "coverage" , "Garments to cover head and face" , "Covers or partly conceals - bride's face?" , "Obscures" , "See 20" .)

I've seen this clue in The Guardian and The Globe and Mail.

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