Sunrise sketched right away (4)

I believe the answer is:

dawn

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'sunrise' is the definition.
(synonyms)

I cannot understand how the remainder of the clue works.

(Other definitions for dawn that I've seen before include "Sunrise" , "fresh start" , "Cockcrow" , "Daybreak" , "Early morning sing-song?" .)

I've seen this clue in The Sun and The Times.

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