Bound to leave (4)
I believe the answer is:
skip
I believe this clue is a double definition.
'bound' is the first definition.
(thesaurus)
'leave' is the second definition.
(skipping is a kind of leaving)
'to' is the link.
(Other definitions for skip that I've seen before include "Omit; fail to attend" , "Omit - refuse container" , "Miss - waste container" , "Dumpster -- bypass" , "Jump lightly over; refuse container" .)