Turn back before it erupts (4)

I believe the answer is:

etna

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'it erupts' is the definition.
The definition suggests a singular noun which matches the answer.

'turn back before' is the wordplay.
'turn back' is a reversal indicator.
'before' becomes 'ante' (prefix meaning before).
'ante' back-to-front is 'ETNA'.

Can you help me to learn more?

(Other definitions for etna that I've seen before include "It sometimes blows its top" , "Europe's highest active volcano" , "Sicily's 15" , "Highest peak in Italy south of the Alps" , "Mount . . . . is a volcano in Sicily" .)

I've seen this clue in The Irish News.

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