Separatists no longer controlling northern Italian mountain (4)
I believe the answer is:
etna
'italian mountain' is the definition.
(I've seen this in another clue)
'separatists no longer controlling northern' is the wordplay.
I cannot quite see how this works, but
'no' could be 'n' (common abbreviation) and 'n' is found within the answer.
'separatists' could be 'eta' (ETA, Basque separatist group) and 'eta' is found in the leftover letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for etna that I've seen before include "Sicilian landmark" , "feature spewing lava" , "Neat volcano overturned" , "Active European volcano" , "a mount hotly tipped when it runs" .)