Crossword Genius

Shock horror - Kent is extremely happy county (5,9)

Ross

I believe the answer is:

north yorkshire

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

'county' is the definition.
(I know that North Yorkshire is a county)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

I've seen this clue in The Independent.
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