Raconteur's explosive rant and roar (8)
I believe the answer is:
narrator
'raconteur's' is the definition.
(I've seen this before)
'explosive rant and roar' is the wordplay.
'explosive' is an anagram indicator.
'and' is a charade indicator (letters next to each other).
'rant' after 'roar' is 'roarrant'.
'roarrant' with letters rearranged gives 'NARRATOR'.
(Other definitions for narrator that I've seen before include "Teller - or rat ran (anag)" , "The person telling the story" , "Storyteller" , "The one telling the story - arrant or what?" , "Soryteller" .)