Epic narrative (4)
I believe the answer is:
saga
'epic narrative' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for saga that I've seen before include "A long adventurous story - it's a gas" , "Account of great heroism" , "Norse epic" , "Flag associated with a" , "A long story or poem - it's a gas" .)