  We suggest that clusters or domains of topological charge and action density
occur in the QCD vacuum as an effect of singularities in gauge fields and can
simultaneously lead to confinement and chiral symmetry breaking. The string
constant, condensates and topological susceptibility are estimated within a
simplified model of hyperspherical domains with interiors of constant field
strength with reasonable values obtained. Propagators of dynamical quarks and
gluons have compact support in configuration space, thus having entire Fourier
transforms, which gives rise to their confinement.
