Bound to be in season (6)
I believe the answer is:
spring
This clue is a double definition.
'bound' is the first definition.
(both can mean to leap)
'season' is the second definition.
(spring is a season)
'to be in' acts as a link.
(Other definitions for spring that I've seen before include "Well - bound" , "See 11" , "past February is it?" , "Bound < to start" , "Bound into the season" .)