Craters of the Moon locale (5)
I believe the answer is:
idaho
'craters of the moon locale' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for idaho that I've seen before include "US state E. of Oregon" , "Northern US state" , "Pertaining to the Bard" , "Another state" , "Rocky Mountain state" .)