Swallows up (7)
I believe the answer is:
engulfs
'swallows up' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for engulfs that I've seen before include "Swallows up as waves may" , "Swamps" , "Swallows up, overwhelms" , "Swallows up, as wave might" , "Swallows up completely" .)