Crossword Genius

Roar with laughter in Washington at party for uncompromising banks all getting backed (6)

Ross

I believe the answer is:

guffaw

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'roar with laughter' is the definition.
(thesaurus)

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(Other definitions for guffaw that I've seen before include "Roar of laughter" , "Laugh boisterously" , "A loud raucous laugh" , "coarse laughter" , "way of expressing amusement" .)

I've seen this clue in The Irish Times.
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