Answer:

litotes

AnswerCrossword Clue
LITOTES... using ...: "Mary had no giant lamb - Its fleece was not unwhite"
LITOTESRhetorical form.
LITOTESAffirmation by the negation of the opposite.
LITOTESRhetorical understatement.
LITOTESRhetorical expression such as "not bad at all."
LITOTESUnderstatement: A figure of speech.
LITOTES"A citizen of no mean city."
LITOTESUnderstatement to increase effect.
LITOTESUnderstatement: Rhet.
LITOTESUnderstatement for effect
LITOTESFigure of speech like "no mean feat"
LITOTESFigure of speech like "not unlike"
LITOTES"Not too bad" for "very good"
LITOTESHamlet's not a bad play e.g.
LITOTESFigure of speech that employs ironic understatement