To implement the standard gestures Command+X, Command+C and Command+V in your CAPI/Cocoa runtime application, you must include an
Edit
menu explicitly in your capi:interface definition.
Note: The LispWorks IDE adds a minimal Edit menu to all CAPI interfaces automatically, in order to make these standard gestures work in the LispWorks IDE, but this does not persist after delivery.
LispWorks Delivery User Guide - 10 Aug 2017