Telling how the island fell back into turmoil (9)
I believe the answer is:
narration
'telling' is the definition.
(I've seen this before)
'the island fell back into turmoil' is the wordplay.
'the island fell' becomes 'arran' (I can't justify this - if you can you should give a lot more credence to this answer).
'back' says the letters should be written backwards.
'turmoil' is an anagram indicator (I've seen this in other clues).
'arran' reversed gives 'narra'.
'into' anagrammed gives 'tion'.
'narra'+'tion'='NARRATION'
'how' acts as a link.
Can you help me to learn more?
(Other definitions for narration that I've seen before include "Process of storytelling" , "Spoken account" , "Account of events" , "telling" , "Voice-over in film" .)