Oddly overlooked untemptable state (5)
I believe the answer is:
nepal
'state' is the definition.
(Nepal is an example)
'oddly overlooked untemptable' is the wordplay.
'oddly overlooked' indicates alternate letters.
The alternate letters of 'untemptable' are 'NEPAL'.
(Other definitions for nepal that I've seen before include "Plane country north-east of India" , "Small lake" , "Gurkhas' homeland" , "mountainous region" , "Himalayan republic" .)