new wrinkle
A clever device or expedient, a novelty, as in The players added a new wrinkle to victory celebrations by tossing their shirts to the crowd after the game. In the form of simply a wrinkle, this expression dates from the mid-1700s, new being added two centuries later.
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The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.