If you are using the V4 base model, which you are not, all of the clothing will fit perfectly. Clothing for Gen 4 figures need to contain any morphs that you are using (unlike Genesis).
In the previous version, DS3A, there was an option called Morph Follower, which did what you are looking for. That is now called Transfer Active Morphs in DS4P. How well it will work I do not know.
You are not using the base V4 figure, what Morphs do you have applied to the base? If you look in the Parameters tab, you will see a Currently Used tab, and that will list any morphs that you have applied. Clothing for Genesis adjusts automatically to most of the forms that Genesis can assume, but it is a Generation 5 figure.