The use of an overstatement or exaggeration for effect (9)

I believe the answer is:

hyperbole

(Other definitions for hyperbole that I've seen before include "Exaggerated language, not meant literally" , "Deliberately extravagant exaggeration" , "not to be taken literally" , "The use of exaggeration for effect" , "Deliberate exaggeration used for effect" .)

I've seen this clue in The Irish Times.

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