A little light is shining (5)

I believe the answer is:

aglow

I'm a little stuck... Click here to teach me more about this clue!

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

'a little light' is the wordplay.
'little light' becomes 'glow' (glow is a kind of light. I am not sure about the 'little' bit.).
'a'+'glow'='AGLOW'

Can you help me to learn more?

(Other definitions for aglow that I've seen before include "Illuminated" , "to be exhibiting radiance" , "Gently radiant" , "Giving out a steady light" , "Lit up" .)

I've seen this clue in the Evening Standard.

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