Wind round and round filling small opening (7)

I believe the answer is:

chinook

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

'wind' is the definition.
(chinook is a kind of wind)

I don't understand how the rest of the clue works.

(Other definitions for chinook that I've seen before include "Arctic wind" , "warm one" , "O in hock (anag)" , "Warm dry wind of the Rockies - large Pacific salmon" , "What blows" .)

I've seen this clue in The Independent.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.