Container of riches, treasure, perhaps (5)

I believe the answer is:

chest

'container' is the definition.
(chest is a kind of container)

'of riches treasure perhaps' is the wordplay.
'of' says the answer is hidden in the clue.
'CHEST' can be found hidden inside 'riches treasure perhaps'.

(Other definitions for chest that I've seen before include "Strongbox; sternum" , "Bust" , "ark" , "Trunk or crate" , "Treasure box?" .)

I've seen this clue in the Evening Standard.

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