Being light, permitting you to raise them? (4)

I believe the answer is:

rays

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'being light' is the definition.

I don't understand the remainder of the clue.

(Other definitions for rays that I've seen before include "Beams from sun or moon" , "Fish with wing-shaped fins and long tails" , "Flat fish" , "Narrow beams of light" , "Pencils of light" .)

I've seen this clue in the Evening Standard.

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