Leap around light (4)
I believe the answer is:
pale
'light' is the definition.
(light in colour)
'leap around' is the wordplay.
'around' indicates anagramming the letters.
'leap' anagrammed gives 'PALE'.
(Other definitions for pale that I've seen before include "wooden post" , "Stake, lacking colour" , "livid" , "Very light coloured" , "Colourless" .)