  The magnetic properties of a pyrochlore iridate Dy$_2$Ir$_2$O$_7$ prepared by
the CsCl flux method were investigated by means of specific heat and
magnetization measurements. The low temperature behaviour was confirmed to be
consistent with previously published results, whereas the high temperature data
and their analysis are presented for the first time. At 128 K, a bifurcation of
magnetization measured under zero field cooled and field cooled regimes
coincides with an onset of the anomaly in specific heat pointing to an ordering
of the iridium sublattice. Further, our high-temperature magnetization and
specific heat data are interpreted in the frame of the previously determined
crystal field scheme for Dy$_2$Ir$_2$O$_7$. The difference between calculations
and experimental data, represented by 20 K specific heat anomaly, suggests the
behaviour of studied iridate beyond the mean field approximation. This is in
contrast with the rest of the heavy rare-earth pyrochlore iridates, where the
mean field approximation constitutes an adequate description.
