Just to add to what MaxRod said, because the Control Room can be confusing to many: The easiest way to set up what you need to do is, as Max said, use the control room - set up a control room stereo output, and route it to the main outs on your Clarett. Then, in the outputs tab of vst connections (where you would normally have routed your main outs) leave them as “not connected”. Then open the control room mixer and insert the ARC plugin.
This will let you monitor through the plugin, but export without it.