It emits lava (7)

I believe the answer is:

volcano

'it emits lava' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for volcano that I've seen before include "Lava-spewing mountain" , "St Helens?" , "Dangerous mountain like Stromboli or Etna" , "Fiery mountain" , "kind of mountain" .)

I've seen this clue in The Irish Times.

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