what is it?
jets without IR source?
there's a smaller radio source below the larger ones but without contour to mark it.
Welcome to RGZ, jusch! 😃
The 'jet' has the same source as the J-shaped emission below it (to the S).
The host - likely zph 0.14 SDSS J072107.56+363845.2, see below - has strong 'central' radio emission, and two radio lobes. If they were in a straight line, we'd call it a triple; however, they are 'swept back', forming a sorta bent U-shape. The 'sweeping back' is due to the motion of the host galaxy through the inter-galactic medium (in this case, near the center of a cluster of galaxies). Such a source is called a 'wide angled tail', or #wat for short.
Hope this helps, and happy hunting! 😄