The length an association will go to? (6)

I believe the answer is:

league

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

'go to?' is the definition.
Although both the answer and definition are verbs in their base form, I can't see how they can define each other.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for league that I've seen before include "Group of countries in mutual cooperation" , "Alliance, association" , "Confederacy" , "... and three sea miles" , "some mileage?" .)

I've seen this clue in The Globe and Mail and The Irish 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.