Change the color of (3)
I believe the answer is:
dye
'change the color of' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dye that I've seen before include "Hair colouring" , "Tint" , "Colouring; sounds like fade" , "Colourant" , "Liquid used to change colour of clothes" .)