How to clear a Widget Property?

I’ve mistakenly assigned a slider and a pedal to control the same mapping. I can’t seem to find out from the manual how to clear one of the controllers on my keyboard. What am I missing?
Thx

Click on the widget, go to the mapping section on the right and select “no plugin”

Thx!
So the Clear button isn’t used in this operation?

Are you trying to remove a mapping from a widget to a plugin parameter or a mapping from a controller to a widget?

Initially, I tried to undo the controller mapping to a widget, but couldn’t figure that out, hence my post here.

The Clear button in the MIDI section should do that