Go like a geyser

SPEW

Think of how a volcano might violently release its contents in a sudden burst.

"Go like a geyser" hints at the action of erupting or bursting out forcefully, which is what geysers do. The answer "SPEW" fits because it means to gush or eject liquid (or other material) suddenly, just like a geyser spews water and steam. The clue plays on the idea of movement ("go") combined with the explosive nature of a geyser.