The trace of enclothing refers to a very refined aspect of the trace of opacity of the fourth level, which does not contain enough opacity for a fusion through collision with the supernal light. This trace remains from the last level in each partzuf when it was purified. Our statement that the last level is lost from every partzuf when it is purified refers solely to the loss of the trace of opacity.
The remaining trace of enclothing from the last level that is left in each partition caused the emergence of two structures, male and female, in the heads of each of the partzufim, starting from Ab of Adam Kadmon, and likewise in Sag of Adam Kadmon, and similarly in Mah and Ban of Adam Kadmon, and in all the partzufim of Atzilut.