For a good quick Poser Dynamic Clothes Tutorial, I always go back to Corinthianscori's youtube tutorial (LINK)  It is 10 minutes, and if you follow along, it works!  It doesn't explain the in's and out's of every setting, it is a quick, do this, and you'll be on your way!

I rendered some "free" jeans above, and to be honest, they came out quite good using PhilC's WW2 update for Anastasia.  I would be hard-pressed to buy Jeans (or other basics) for her, since these convert so well.  I assume a basic tee would do the same.

On the flip-side, I am definitely interested in some outfits like ElorOnceDark's above, Uzilite style or Bobbie25...those never convert as well, as they are more intricate.  (...and still interested in the Alyson 1 version, so I can use her in Carrara!  )