Crossword Genius

Rocking on vocal, one issues hot stuff (7)

Ross

I believe the answer is:

volcano

'one issues hot stuff' is the definition.
(source of hot lava)

'rocking on vocal' is the wordplay.
'rocking' indicates an anagram.
'on'+'vocal'='onvocal'
'onvocal' is an anagram of 'VOLCANO'.

(Other definitions for volcano that I've seen before include "kind of mountain" , "Mountain (could be a heavy smoker!)" , "Dormant or active mountain" , "E.g. Vesuvius, Etna" , "Exploding mountain" .)

I've seen this clue in The Telegraph.
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