Crossword Genius

Thing that heralds end or ruin (5,5)

Ross

I believe the answer is:

death knell

(Other definitions for death knell that I've seen before include "passing on rings" , "Bell rung when someone's popped their clogs" , "This will end all the hopes" , "Passing on ring" , "Parting note" .)

I've seen this clue in The Mirror.
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