Crossword Genius

Opening a country club? Excellent! (9)

Ross

I believe the answer is:

uncorking

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

'opening' is the definition.
(uncorking is a kind of opening)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

I've seen this clue in The Times and The Sunday Times.
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