Existing conforming clothing with wrinkles can smooth out with the fitting room or morph brush.

The trick with the morprh brush is to choose the correct size brush, and follow the wrinkles while tightening to the new figure.

And with the fitting room? To fit the clothing, and to pull the wrinkles back in the clothing with the morph brush after the fitting

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!