Poser clothing comes in two types, conforming and dynamic.

You'll use the Clothing Designer and Scissors modules to form the shape of the clothing and save it as a Poser prop. If required the prop may immediately be used in the Cloth Room as dynamic clothing. And/or you can then use the OBJ2CR2 module to convert the prop to conforming clothing.

Workflow...........................

Either
Create the clothing --> save as prop --> convert to conforming clothing figure.

Or
Create the clothing --> save as prop --> use the prop in the Poser Cloth Room as dynamic clothing.

Hope this clarifies :)