  We discovered an X-ray cluster in a recent pointed Chandra observation of the
radio-loud compact-steep-spectrum source 1321+045 at the redshift of 0.263.
1321+045 is part of larger survey which aims to study the X-rays properties of
weak compact radio sources. Compact radio sources are young objects at the
beginning of their evolution and if embedded in an X-ray cluster offer unique
opportunities to study the cluster heating process.
