Odd characters missing in delta near volcano (4)
I believe the answer is:
etna
'volcano' is the definition.
(Mount Etna)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for etna that I've seen before include "A neat sort of volcano" , "It can be scorching" , "Italian volcano" , "Constant smoker" , "Active European volcano" .)