Crossword Genius

To make revelation arrive spotless (4,5)

Ross

I believe the answer is:

come clean

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'to make revelation' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'arrive spotless' is the wordplay.
'arrive' becomes 'come' (synonyms).
'spotless' becomes 'clean' (similar in meaning).
'come'+'clean'='COME CLEAN'

Can you help me to learn more?

(Other definitions for come clean that I've seen before include "how you hope your home delivery laundry will arrive" , "Reveal dirty secrets" , "how you like your laundry to arrive?" , "Informally, confess fully - arrive washed?" , "Admit" .)

I've seen this clue in the Sydney Morning Herald.
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