Colouring (3)
'colouring' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for dye that I've seen before include "Staining material" , "Colorant" , "Pigment" , "Colour by dipping in liquid" , "Colouring material" .)
'colouring' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for pigment that I've seen before include "Colouring substance" , "Colourful substance" , "Colouring material" , "Substance giving colour" , "Colouring matter" .)