Sure to jump (5)
I believe the answer is:
bound
This clue is a double definition.
'sure' is the first definition.
(I've seen this before)
'jump' is the second definition.
(bound is a kind of jump)
'to' is the link.
(Other definitions for bound that I've seen before include "Tied -- limit" , "Place restrictions" , "Tied - leap" , "Destined" , "Spring upward lightly" .)