Spring some year (4)
I believe the answer is:
leap
This clue is a double definition.
'spring' is the first definition.
(both can mean to jump)
'some year' is the second definition.
(leap year is a kind of year)
(Other definitions for leap that I've seen before include "Spring suddenly" , "'Look before you . . . .'" , "Sudden bound" , "Pounce" , "Jump; type of year" .)