Crossword Genius

The crack of dawn? (5,2,3)

Ross

I think it could be either:

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8

5,2,3

break of day

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'the crack of dawn?' is the definition.
(thesaurus)

'crack of dawn?' is the wordplay.
'crack' becomes 'break'.
'dawn?' becomes 'day' (I can't justify this - if you can you should believe this answer much more).
'break'+'of'+'day'='BREAK OF DAY'

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(Other definitions for break of day that I've seen before include "Dawn" , "First light" .)

I've seen this clue in The Telegraph.
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