L - shaped radio emission
From the radio signal I would have expected the host galaxy to be somewhere near either the lower part of the emission or the narrow bridge-like feature, if a single source were responsible. The only IR candidate seems instead to be associated with the strongest part of the radio emission at its right hand side/lobe. It seems a very unusual geometry - is it possible this might be a wat or bent radio source that just happens to have a bright IR source on a line of sight?
The strong IR source is, very likely, a pair of interacting or overlapping ellipticals. Assuming no radio-IR offset, there may be several, unrelated, radio sources: ellipticals in a cluster.
The brightest radio source may be SDSS J090912.11+483641.4, with a photoz of ~0.34, or SDSS J090911.94+483645.1 (0.381):
1 the two redshifts have sufficiently large error bars that they could be the same
by DocR scientist
Several of these sharply bent sources are starting to show up (sometimes referred to as dog-leg). These are definitely worth following up on with further radio observations.