Fourth-largest state (7)

I believe the answer is:

montana

'fourth-largest state' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for montana that I've seen before include "One US state ..." , "American state, capital Helena" , "North-western state bordering Canada" , "State of NW USA" , "State N. of Wyoming" .)

I've seen this clue in the L.A. Times Daily and the Penny Press.

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