A little colour for one idiot pirouetting (5)
I believe the answer is:
tinge
'a little colour' is the definition.
'for one idiot pirouetting' is the wordplay.
'for one' becomes 'eg' (I've seen this in other clues).
'idiot' becomes 'nit' (I've seen this before).
'pirouetting' is a reversal indicator (pirouette is a spin in ballet - letters spin round).
'eg'+'nit'='egnit'
'egnit' in reverse letter order is 'TINGE'.
(Other definitions for tinge that I've seen before include "A slight shade of colour" , "Hint of colour" , "suggestion" , "Colour slightly; trace" , "A shade or a nuance" .)