If the clothing has been made with the morphs, and if the maker gave the morphs the same name as the matching morphs on the figure (Aiko 3 in your case) then the clothes will pick up the morphs, at whatever value, and should fit fairly well. If the morphs are there but have the wrong names then you'll have to adjust them by hand on the clothes. If there are some morphs, but not the ones used in the character, then you may be able to get a fit by adjusting the morphs which are present (you'll need to select the body parts of the clothing instead of the root in some cases, as D|S disconnects the morphs on the root of the clothing when their names match the morphs on the figure wearing the clothes). If you can't get the available morphs to do the job then you can use DForms to pull the clothing into shape, or you can use an external tool such as Morph Magic to create new morphs.