Conforiming clothes will only morph withe the bodt they're applied to if they themselves contain the relevant morphs. Most clothing isn't supplied with the morphs for the characters they're based on, often because those morphs are protected by EULA. Some clothing does feature a few morphs which have been created by the modeller using magnets, in order to allow some fleibility in their clothes. But otherwise, the only ways to ensure a proper fit of an ite of clothing to a figure are to buy a piece of custom software, such as Tailor, Clothing Converter, or Wardrobe Wizard; learn to use magnets and create the morphs yourself; or leanr how to use the clothing room and turn the clothes into a dynamic solution.

jonthecelt