Most visual approaches are not charted, so they do not have a published missed. If you are doing an ILS to a visual, the ILS published missed would probably be safe, but if it's severe clear you have no idea what other traffic issues exist. You cannot assume that you can safely do the missed for the ILS, BC, LOC, or VOR for that runway.
Fly straight out (terrain permitting) and talk to tower. If you go lost comms, fly the most sensible pattern and try to get comms back (look for light gun signals).