Large scale story of those revolting characters on the borders of Cinemascope (4)
I believe the answer is:
epic
'large' is the definition.
(similar in meaning)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for epic that I've seen before include "of impressive proportions?" , "On a grand scale, like heroic poem" , "Marathon" , "blockbuster" , "Long poem - awesome!" .)