Here your panniers get lost (2,4,4)
I believe the answer is:
on your bike
'get lost' is the definition.
(both can be used to tell someone to go away)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for on your bike that I've seen before include "Get away!" , "Clear off! (slang)" , "mocking dismissal" , "Scram!" .)