Symbol of peace created a splash in America (4)

I believe the answer is:

dove

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'symbol of peace' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

(Other definitions for dove that I've seen before include "So-called pacifist" , "Peacemaker" , "plunged in the Grand Canyon" , "Bird[s]" , "A peaceful bird?" .)

I've seen this clue in The Guardian.

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