Investigation extinguishing party’s revival (11)

I believe the answer is:

renaissance

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'revival' is the definition.
(I know that Renaissance is a type of revival)

I cannot understand how the rest of the clue works.

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(Other definitions for renaissance that I've seen before include "revival starting in Florence" , "revival of culture" , "transitional period" , "Awakening" , "New birth" .)

I've seen this clue in The Times.

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