Coloring stick (6)
I believe the answer is:
crayon
'coloring stick' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for crayon that I've seen before include "Pencil of chalk or wax" , "One colours with this" , "Coloured wax pencil" , "pencil (13) [FRENCH]" , "Colouring pencil" .)