Crossword Genius

Cataclysmic outburst of stellar energy (9)

Ross

I believe the answer is:

supernova

(Other definitions for supernova that I've seen before include "Exploding star that becomes extremely luminous" , "cosmic explosion" , "Star in decline" , "it puts an end to a starry career" , "The sort of star" .)

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