Spout forth (4)
I believe the answer is:
spew
'spout forth' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for spew that I've seen before include "Cast out in a stream, vomit" , "Fetch up" , "Expel" , "Be expelled rapidly in large quantities" , "Forcibly eject" .)