Volcano in Sicily (4)
I believe the answer is:
etna
'volcano in sicily' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for etna that I've seen before include "Highest peak in Italy south of the Alps" , "feature spewing lava" , "Volcano in Italy" , "Threatening mountain" , "Heating vessel" .)