Long account from bores again (4)
I believe the answer is:
saga
'long account' is the definition.
(a saga is a long narrative or account)
'from bores again' is the wordplay.
'from' indicates the answer is hidden within the clue.
'SAGA' is hidden in the letters of 'bores again'.
(Other definitions for saga that I've seen before include "Long heroic, family, story" , "Medieval Icelandic legend" , "Heroic narrative" , "Epic tale" , "Long involved tale" .)