Information copied to the Windows clipboard; typically copied by selecting an object or section of text and pressing Control-C or choosing "Copy" from the Edit menu; can be pasted into an open window or document by pressing Control-V or selecting "Paste" from the Edit menu.
Program(s) that open clp files
Windows: Paste into an open document (select "Paste" from the Edit menu); Corel Paint Shop Pro
Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/clp