Throw a bribe (4)
I believe the answer is:
bung
I believe this is a double definition.
'throw' is the first definition.
(I've seen this before)
'a bribe' is the second definition.
(I've seen this before)
(Other definitions for bung that I've seen before include "Rubber stopper" , "Somehow stop" , "Bribe (slang)" , "Throw; stopper" , "Plug for a hole in a barrel or boat" .)