The length an association will go to? (6)

I believe the answer is:

league

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'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 Irish Independent and The Globe and Mail.

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