Stains (4)
'stains' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dyes that I've seen before include "Substances for staining or colouring" , "Many a pigment" , "Colouring materials" , "Colour" , "turns green, possibly" .)
'stains' is the definition.
('mark' can be a synonym of 'stain')
This is all the clue.
(Other definitions for marks that I've seen before include "Grades assigned to school work" , "Goals" , "See 8" , "Targets" , "Stains" .)