Crossword Genius

Make colourless; whiten (6)

Ross

I believe the answer is:

bleach

I believe this is a double definition.

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

'whiten' is the second definition.
(I know that bleach is a type of whiten)

(Other definitions for bleach that I've seen before include "Strong cleaner" , "Household cleanser" , "Blanche" , "Stuff that whitens, hair or cloth" , "Peroxide" .)

I've seen this clue in The Guardian.
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