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A burning issue may rise out of it (7)

Ross

I believe the answer is:

volcano

I'm a little stuck... Click here to teach me more about this clue!

'a burning' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.

'may rise out of it' is the wordplay.
I cannot really understand how this works, but
'may' could be 'can' (synonyms) and 'can' is found within the answer.
'of' could be 'o' and 'o' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

'issue' acts as a link.

Can you help me to learn more?

(Other definitions for volcano that I've seen before include "Vent in earth's crust" , "Exploding mountain" , "Erupting fissure in the earth's crust" , "Etna is one, and Stromboli" , "E.g. Vesuvius, Etna" .)

I've seen this clue in The Globe and Mail.
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