Explode like a volcano (5)
I believe the answer is:
erupt
'explode like a volcano' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for erupt that I've seen before include "What canines do" , "Break out like Etna" , "go up" , "Explode" , "Eject lava" .)