"The Prisoner of Zenda" setting (9)
I believe the answer is:
ruritania
'the prisoner of zenda setting' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ruritania that I've seen before include "Hope place" , "Hope country" , "RA Air Unit (anag.)" , "Land of Hope ..." , "Fictional land of romance" .)