Gleaming ring held inside worth a lot (4)

I believe the answer is:

halo

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'gleaming ring' is the definition.
'halo' can be an answer for 'ring' (synonyms). I'm not sure about the 'gleaming' bit.

'held inside worth a lot' is the wordplay.
'held' says the answer is hidden in the clue.
'HALO' is hidden in the letters of 'inside worth a lot'.

Can you help me to learn more?

(Other definitions for halo that I've seen before include "Sign of sainthood" , "overhead lighting?" , "Circle over a saint" , "Crown" , "Ring (around sun or moon)" .)

I've seen this clue in The Times.

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