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Book has the ability to offend for a start -- might one blow one's top? (7)


I believe the answer is:


(Other definitions for volcano that I've seen before include "Etna is one, and Stromboli", "Eg, Cotopaxi", "Vent in earth's crust", "A fissure in the earth's crust with molten rock", "Lava-spewing mountain".)

I've seen this clue in The Telegraph.
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