One raised to surrender? (5,4)

I believe the answer is:

white flag

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'surrender?' is the definition.
(thesaurus)

I don't understand how the remainder of the clue works.

(Other definitions for white flag that I've seen before include "It signals surrender" , "Symbol of truce" , "Pallid banner for surrender" , "Token of surrender" , "Sign of surrender" .)

I've seen this clue in The Hindu.

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