Bay of Naples isle (5)
I believe the answer is:
capri
'bay of naples isle' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for capri that I've seen before include "Italian isle" , "found in Tyrrhenian location" , "Island off Italy" , "Romantic and expensive island in Bay of Naples" , "Island near Naples" .)