I don't (read can't!) create clothing (or other props, etc.) as I do not have the relevant skills. What I do is take what others have created and drape the models with them.
The clothing you can obtain (free or bought) seems to come in a couple of 'styles' (none of which is really well-defined). There's conforming and super-conforming. As far as I know the latter means that the clothing will follow (and duplicate) any morphs that the figure it is draped onto is given: modify a body morph on V4 and the clothing will follow suit.
Many (most?) clothing will try and follow posing of the underlying figure, but will often 'break' at a certain point (usually arm or leg movement). Some clothing has specific morphs attached to the relevant 'bones' to help deal with that - not the most obvious place to hide it in my view! Others have 'handles' (often showing as arrows, spheres or cones in the scene) which can be used to move the clothing to better follow any pose of the figure.
Then there is dynamic clothing (there is DAZ DC and Poser DC), where you need an add-in by OptiTex to use DAZ DC. Poser DC is purely for Poser and does not work in DAZ. You can get some good effects with DC - your second picture looks as if it may be using it.
Then, of course, the dreaded 'poke-through' where prt of the body of the figure pokes through the clothing. Various ways of dealing with that exist - from making the underlying body part invisible, rotating the angle of view so the poke-through is not seen any more, using morphs, handles, etc., to adjust the clothing and D-forms (which are a subject unto themselves!)