Give out steady light (4)

I believe the answer is:

glow

'give out steady light' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for glow that I've seen before include "warmth of feeling" , "Emanate light" , "Give out light without flame" , "Gentle, warm light" , "Incandescence" .)

I've seen this clue in The Independent and The Times.

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