The mineral wealth of Korea? (3)

I believe the answer is:

ore

'the mineral wealth' is the definition.
(source of a mineral)

'of korea?' is the wordplay.
'of' says the answer is hidden in the clue.
'ORE' can be found hidden inside 'korea'.

(Other definitions for ore that I've seen before include "14 [CURRENCY UNIT]" , "Raw metal" , "Material for smelting" , "Mineral - Scandinavian money" , "Metal-bearing rock or mineral" .)

I've seen this clue in the Evening Standard.

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