A little light in shining (5)

I believe the answer is:

aglow

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

'shining' is the definition.
(I've seen this before)

'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'

'in' is the link.

Can you help me to learn more?

(Other definitions for aglow that I've seen before include "Smouldering" , "Warm - shiny" , "Giving out a steady light" , "Gently radiant" , "Shining" .)

I've seen this clue in the Evening Standard.

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