Tint, stain (3)

I believe the answer is:

dye

I believe this clue is a double definition.

'tint' is the first definition.
(I've seen this before)

'stain' is the second definition.
(I've seen this before)

(Other definitions for dye that I've seen before include "Staining material" , "Colour by dipping in liquid" , "Colouring matter" , "Colouring agent" , "Tint" .)

I've seen this clue in The Mirror.

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