Disable "Clone" option on items that have server-side components, for which the clone will fail

“Reporting, Printing, Access Control, and Server Workflows all contain a server-side data component. Web apps, Mobile apps, Client-side workflows, and Inline views do not and can be cloned without issues.”

This is for clarity and time-saving's sake.

Note: using the “save as” option in the respective designer is a valid and recommended method.