Cover up 1ac broadcast (4)

I believe the answer is:

veil

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'cover up' is the definition.
(I've seen this in another clue)

I don't understand how the rest of the clue works.

(Other definitions for veil that I've seen before include "Bridal face covering" , "Material over face" , "Face concealer" , "Curtain, disguise" , "To obscure" .)

I've seen this clue in The Times.

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