Chronicler of nonsense Scottish island's brought back (8)
I believe the answer is:
narrator
'chronicler' is the definition.
(thesaurus)
'nonsense scottish island's brought back' is the wordplay.
'nonsense' becomes 'rot' (rot can mean nonsense or rubbish).
'scottish island' becomes 'arran' (island off the coast of Scotland).
'brought back' is a reversal indicator.
'rot'+'arran'='rotarran'
'rotarran' back-to-front is 'NARRATOR'.
'of' acts as a link.
(Other definitions for narrator that I've seen before include "he gives an account" , "The one telling the story - arrant or what?" , "Story teller" , "taleteller" , "Storyteller" .)