  We perform a mutual analysis of the topological and chiral vacuum structure
of four-dimensional QCD on the lattice at finite temperature. We demonstrate
that at the places where instantons are present, amplified production of quark
condensate takes place. It turns out for full QCD that the clusters of
nontrivial chiral condensate have a size of about 0.4 fm corresponding to the
instanton sizes in the same configurations.
