It may contain some of the richest treasure (5)

I believe the answer is:

chest

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'it may contain some' is the definition.
The definition suggests a singular noun which matches the answer.

'of the richest treasure' is the wordplay.
'of' indicates a hidden word.
'CHEST' is hidden in the letters of 'richest treasure'.

Can you help me to learn more?

(Other definitions for chest that I've seen before include "Large, sturdy box with a lid" , "It's enclosed by the ribs" , "Strongbox; sternum" , "Large strong box for storage" , "Bra on it" .)

I've seen this clue in the Evening Standard.

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