Wealth and riches accumulated over a period, may be hidden (8)

I believe the answer is:

treasure

(Other definitions for treasure that I've seen before include "Accumulated wealth, could be buried" , "... story by R.L. Stevenson" , "' - - Island' novel" , "Set great store by" , "Highly prized possession" .)

I've seen this clue in The Irish Times.

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