  Hard scattering to a three cluster final state is suggested as a method to
probe configurations in hadrons containing small size color singlet cluster and
a residual quark-gluon system of a finite mass. Examples of such processes
include $e + N \to e+ p +M_X (\Lambda+M_X'), p+p \to p+p+M_X(p+\Lambda+M_X')$
where $M_X(M_X')$ could be a pion(kaon) or other state of finite mass which
does not increase with momentum transfer ($Q^2$). We argue that different
models of the nucleon may lead to very different qualitative predictions for
the spectrum of states $M_X$. We find that in the pion model of nonperturbative
$q \bar q$ sea in a nucleon the cross section of these reactions is comparable
to the cross section of the corresponding two-body reaction. Studies of these
reactions are feasible using both fixed target detectors (EVA at BNL, HERMES at
DESY) and collider detectors with a good acceptance in the forward direction.
