A state? A right state! (8)
I believe the answer is:
arkansas
'a state?' is the definition.
(Arkansas is an example)
'a right state' is the wordplay.
'a right' becomes 'ar' (I've seen this in other clues).
'state' becomes 'kansas' (Kansas is an example**).
'ar'+'kansas'='ARKANSAS'
(Other definitions for arkansas that I've seen before include "Confederate state in the American Civil War" , "American river and state" , "American state, capital Little Rock" , "Birth state of Bill Clinton" , "Little Rock's state" .)