Crossword Genius

In hearing, launderer's confession is nonsense (7)

Ross

I believe the answer is:

eyewash

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

I don't understand the remainder of the clue.

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(Other definitions for eyewash that I've seen before include "this is soothing sight" , "Nonsense; cleansing lotion" , "Nonsense (colloq.)" , "Optic solution to relieve irritation - rubbish!" , "Pupils may benefit from this" .)

I've seen this clue in The Independent.
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