Leap about, having lost colour (4)
I believe the answer is:
pale
'lost colour' is the definition.
'pale' can be an answer for 'colour' (I have seen 'Lacking colour ' mean 'pale' so perhaps 'colour' could also mean 'pale'). I am not sure about the 'lost' bit.
'leap about' is the wordplay.
'about' indicates anagramming the letters.
'leap' is an anagram of 'PALE'.
'having' acts as a link.
Can you help me to learn more?
(Other definitions for pale that I've seen before include "Dim - wan" , "A bit of fencing" , "Whitish" , "Colourless" , "Not bright - limit" .)