  Accretion and merger shocks in clusters of galaxies are potential
accelerators of high-energy protons, which can give rise to high-energy
neutrinos through pp interactions with the intracluster gas. We discuss the
possibility that protons from cluster shocks make a significant contribution to
the observed cosmic rays in the energy range between the second knee around
10^17.5 eV and the ankle around 10^18.5 eV. The accompanying cumulative
neutrino background above PeV may be detectable by upcoming neutrino telescopes
such as IceCube or KM3NeT, providing a test of this scenario as well as a probe
of cosmic-ray confinement properties in clusters.
