A [[cross-laced clothes|cross lace]] decoration in the center of the waist area to make it more form fitting, a very classic "corset" appearance.

This includes both ones on a real [[corset]] and ones attached to a [[skirt]] or [[dress]], but the cross lace part should stay "corset-like". If it expands upwards or downwards, it's a [[cross-laced top]], [[cross-laced skirt]] or [[cross-laced dress]] instead, depending on the type of clothing item.