Got back before it erupted (4)
I believe the answer is:
etna
'it erupted' is the definition.
The definition suggests a singular noun which matches the answer.
'got back before' is the wordplay.
'got back' says the letters should be written backwards.
'before' becomes 'ante' (I've seen this before).
'ante' back-to-front is 'ETNA'.
Can you help me to learn more?
(Other definitions for etna that I've seen before include "source of fumes?" , "Long-term smoker" , "Active European volcano" , "hole in the crust" , "hotly-tipped runner" .)