Get rid of — tip (4)
I believe the answer is:
dump
I believe this clue is a double definition.
'get rid of' is the first definition.
(dumping is a kind of getting rid of)
'tip' is the second definition.
(I've seen this before)
(Other definitions for dump that I've seen before include "Empty out" , "Public rubbish tip" , "Repository for rubbish etc" , "Place for unwanted things" , "Get rid of" .)