To place a class from the Class Browser on the Object Clipboard, select the class name in the Hierarchy , Superclasses , Subclasses or Precedence tab, and choose Classes > Clip .
To place a slot definition object from the Class Browser on the Object Clipboard, select the slot name in the Slots tab, and choose Slots > Clip .
To place a method or generic function object from the Class Browser on the Object Clipboard, select it in the Functions tab, and choose Methods > Clip .
LispWorks IDE User Guide (Macintosh version) - 25 Nov 2011