The problem is that many vendors do not build all the morphs into conforming clothing. I use (on occasion) the free Ultimate Breast morphs and absolutely NO conforming clothes fit.

There are utilities that will try to make figure morphs into clothing morphs, but if that is not working you are back to one of the following.

1. dynamic cloth and the cloth room.

2. magnets

3 Morph brush

4.Modelling application

 

To clarify, conforming items conform to the skeleton (rigging) of the character, not to the outer skin.  They need the morphs added to them to match a morphed character.

 For V4 you also need to apply the magnetise pose to get a proper fit.