  On the basis of the mechanism proposed for one-spin asymmetries in inclusive
hadron production we specify an $x$--dependence of asymmetries in inclusive
processes of pion production. The main role in generation of this asymmetry
belongs to the orbital angular momentum ofquark-antiquark cloud in internal
structure of constituent quarks. The $x$--dependence of asymmetries in the
charged pion production at large $x$ reflects the corresponding dependence of
constituent quark polarization in the polarized proton.
