Discovering Midas Show Band from Boise, perhaps (7)
I believe the answer is:
idahoan
'from boise perhaps' is the definition.
(Boise is the capital of Idaho)
I can't explain the remainder of the clue.
(Other definitions for idahoan that I've seen before include "from Boise, say" , "from a certain state" , "man in a state?" , "Citizen of Boise, perhaps" .)