ClearURL is probably targeted more at Linux users - gui cut'n'paste using highlighting is different.

As soon as you highlight something under the gui it is selected. Middle clicking then pastes the selection. So if you highlight it to delete it (ctrl-L) then click middle mouse, the thing you just highlighted to delete comes back - suboptimal that one...
Of course ctrl-c/v/x also works but that uses the paste buffer, not the selection.
Of course some applications (oh, emacs, how could you screw this up *so* badly) mix up paste+selection which can be a tad confusing. Understand? No? Not surprised

I use ClearFields 3.01 FWIW