Western
'western' is the definition.
(synonyms)
This is the entire clue.
(Another definition for horse opera that I've seen is " Western".)
'western' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for oater that I've seen before include "Film" , "Horse" .)
'western' is the definition.
(I know that western can be written as horse opera)
This is the entire clue.