  In lattice QCD with Wilson-type quarks, the chiral symmetry is explicitly
broken by the Wilson term on finite lattices. Though the symmetry is guaranteed
to recover in the continuum limit, a series of non-trivial procedures are
required to recover the correct renormalized theory in the continuum limit.
Recently, a new use of the gradient flow technique was proposed, in which
correctly renormalized quantities are evaluated in the vanishing flow-time
limit. This enables us to directly study the chiral condensate and its
susceptibility with Wilson-type quarks. Extending our previous study of the
chiral condensate and its disconnected susceptibility in (2+1)-flavor QCD at a
heavy $u$, $d$ quark mass ($m_{\pi}/m_{\rho}\simeq0.63$) and approximately
physical $s$ quark mass, we compute the connected contributions to the chiral
susceptibility in the temperature range of 178--348 MeV on a fine lattice with
$a\simeq0.07$ fm.
