ClarisWorks used templates (.cws) to quickly produce documents (.cwk) based on the same settings and properties. This was a standard workflow in ClarisWorks and not actual conversion. It is unlikely you can reproduce this using any other software, so the original one remains your only choice.
Convert ClarisWorks document template to ClarisWorks document file.
We have found one software suitable in our database for this conversion.
Apple macOS / Mac OS X software - convert cws to cwk on OS X
ClarisWorks (also AppleWorks) was office suite for Apple Mac OS, Mac OS X and later for Windows. ClarisWorks contains word processor, drawing program, painting program, spreadsheet, database program, and a terminal program for communications.
Convert from cws file
to cwk file
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.