Become entangled on your bike! (3,7)
I believe the answer is:
get knotted
I believe this is a double definition.
'become entangled' is the first definition.
(I've seen this before)
'on your bike' is the second definition.
(I've seen this before)
(Other definitions for get knotted that I've seen before include "on your bike" , "express disapproval thus" , "Become entangled" , "What your muscles may do" .)