Is capable of fiery outbursts knocking back most of the garlic, cutting the head in a frenzy (8)
I believe the answer is:
volcanic
'head in a frenzy' is the definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I don't see?
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for volcanic that I've seen before include "Relating to mountains such as Vesuvius" , "Explosively unstable, rock say" , "Like lava, perhaps" , "given to sudden outbursts" , "Relating to eruption in earth's surface" .)