Crossword Genius

Revelation in ballad shortly penned by a writer (10)

Ross

I believe the answer is:

apocalypse

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'revelation' is the definition.
(synonyms)

I cannot understand how the rest of the clue works.

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(Other definitions for apocalypse that I've seen before include "World's end" , "sacred book" , "End of the world" , "Catastrophic event" , "Revelation" .)

I've seen this clue in The Independent.
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