Boise's state (5)
I believe the answer is:
idaho
'boise's state' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for idaho that I've seen before include "My Own Private -- (1991 film)" , "Pertaining to the Bard" , "found in America" , "NW state of USA" , "State of NW US" .)