(1) Thanks for the great laugh.
(Of course, we really should not laugh at people who are doing their
best to write in another language.)
(2) Your sentence means that the ladies have taken off their
clothes (to cast off) and people can now see the ladies in the basement.
(3) Believe it or not, we can "fix" your sentence with just a little hyphen.
The ladies have cast-off clothing. That is, they have clothing that
people no longer want.
***** Thanks for the laugh *****
Student or Learner