  We show that self-consistent partial synchrony in globally coupled
oscillatory ensembles is a general phenomenon. We analyze in detail appearance
and stability properties of this state in possibly the simplest setup of a
biharmonic Kuramoto-Daido phase model as well as demonstrate the effect in
limit-cycle relaxational Rayleigh oscillators. Such a regime extends the notion
of splay state from a uniform to distribution of phases to an oscillating one.
Suitable collective observables such as the Kuramoto order parameter allow
detecting the presence of a inhomogeneous distribution. The characteristic and
most peculiar property of partial synchrony is the difference between the
frequencies of single units and that of the macroscopic field.
