Site of Vulcan's forge (4)
I believe the answer is:
etna
'site of vulcan's forge' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for etna that I've seen before include "Volcano in Sicily, quite neat" , "Active European volcano" , "Italian smoker" , "Sicily's 15" , "Long-term smoker" .)