Make appeal, possibly in Spring? (4)
I believe the answer is:
leap
'spring?' is the definition.
(both can mean to jump)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for leap that I've seen before include "Spring suddenly" , "Pounce" , "Jump, spring" , "'Look before you . . . .'" , "Sort of year" .)