Since all times I fight with a method to clear a wrong definition by

Clear@mydef[x_]:=...

just by prepending the Clear@ in front, highlight the text up to " [" and press Shift+Ctrl+Enter for immediate execution and clearing the definition.

In vs 13, often overwriting a definition does not work so anymore, especially in multiple definitions with conditions. Not to mention the nuisance when setting f=4 first and defining f[x_]:= later on.

How to add this procedure similar to the Shift+Ctrl+Enter entry in keyevent.tr located in SystemFiles\FrontEnd\TextResources\Windows\KeyEventTranslations.tr ?