Italian erupter (4)
I believe the answer is:
etna
'italian erupter' 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 "smoker in Sicily" , "Sicilian volcano" , "source of fumes?" , "Threatening mountain" , "a mount hotly tipped when it runs" .)