Narrate again (6)
I believe the answer is:
retell
'narrate again' is the definition.
('tell' can be a synonym for 'narrate' so perhaps 'retell' is OK for 'narrate again')
This is all the clue.
(Other definitions for retell that I've seen before include "Once again inform" , "Repeat" , "Narrate again" , "Once more recount story" .)