Crossword Genius

It's mined in Korea (3)

Ross

I believe the answer is:

ore

I'm a little stuck... Click here to teach me more about this clue!

'it's mined' is the definition.
I can't tell whether this defines the answer.

'in korea' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ORE' is hidden in the letters of 'korea'.

Can you help me to learn more?

(Other definitions for ore that I've seen before include "Mineral - Scandinavian money" , "it could be gold" , "Deposit of mine" , "15 down earth" , "Solid rock containing metal" .)

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