Spring, leap (4)
I believe the answer is:
jump
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">spring</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that spring is a more specific form of jump)</span><br/ ><br/ >'<span class="explanation-format__original">leap</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that leap can be written as jump)</span><br/ ><br/ ></span>
(Other definitions for jump that I've seen before include "Hurdle" , "Spring" , "Leap, bound" , "Make abrupt movement - start" , "Vault, bound" .)