Peak or apex (4)

I believe the answer is:

acme

I believe this clue is a double definition.

'peak' is the first definition.
(synonyms)

'apex' is the second definition.
(synonyms)

(Other definitions for acme that I've seen before include "Summit - climax" , "Summit of achievement" , "Came awkwardly to the highest point" , "Summit - maximum" , "crisis in history" .)

I've seen this clue in the Newsday.

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