Canadian territory the solver studies, so to speak? (5)

I believe the answer is:

yukon

'canadian territory' is the definition.
(one of the territories of Canada)

I can't explain the remainder of the clue.

(Other definitions for yukon that I've seen before include "mineral-rich area" , "Canadian territory containing Klondike" , "NW Canadian territory" , "Canadian territory adjoining Alaska" , "Canadian territory, river" .)

I've seen this clue in The Times.

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