I would clear the indicators at the start of a run, not at the end of it. That way, the results of a run are displayed even after the VI stops.
One way to clear all indicators without any code is to set the VI Properties to Clear Indicators When Called. From the VI's File menu, goto VI Properties. Under Category, select Execution, then check Clear Indicators When Called.
I don't use the Reinitialize All to Default because that resets the controls as well as the indicators. This could frustrate a user who operates some controls before running the VI.
If you want to select which indicators to clear, you can use local variables or the Value property on a Property Node, or the Reint To Dflt method on an invoke node for the individual controls to be cleared.