  Direct evidence of stellar material from galaxy disruption in the
intra-cluster medium (ICM) relies on challenging observations of individual
stars, planetary nebulae and diffuse optical light. Here we show that the
ultra-compact dwarf galaxies (UCDs) we have discovered in the Fornax Cluster
are a new and easy-to-measure probe of disruption in the ICM. We present
spectroscopic observations supporting the hypothesis that the UCDs are the
remnant nuclei of tidally ``threshed'' dwarf galaxies. Deep optical imaging of
the cluster has revealed a 43-kpc long arc of tidal debris, flanking a
nucleated dwarf elliptical (dE,N) cluster member. We may be witnessing galaxy
threshing in action.
