Crossword Genius

State that's stunned to host our excellent sporting event (4,2,6)

Ross

I believe the answer is:

tour de france

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

'sporting event' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for tour de france that I've seen before include "Famous cycle race" , "Professional cycle road race" , "Tuned for race (anag) - a cycle race" , "sporting event" , "Major bike race" .)

I've seen this clue in The Everyman puzzle in The Observer.
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