A novel idea or technique; expedient; trick: Hey, that little gismo is a new wrinkle(1899+)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with 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.