  We estimate the quark condensate in one-flavor massless QCD from the known
value of the gluino condensate in SUSY Yang-Mills theory using our newly
proposed "orientifold" large-N expansion. The numerical result for the quark
condensate renormalized at the scale 2 GeV is then given as a function of
alpha_s(2 GeV) and of possible corrections from sub-leading terms. Our value
can be compared with the quark condensate in (quenched) lattice QCD or with the
one extracted from the Gell-Mann--Oakes--Renner relation by virtue of
non-lattice determinations of the quark masses. In both cases we find quite a
remarkable agreement.
