Dedicated disc image handling apps like the DropDMG support a great number of various formats, including formats exclusive to OS X. Hence it should be pretty possible to convert CloneCD images to Apple Final Cut Pro format (*.cdr).
Convert CloneCD image file to Apple Final Cut Pro CD or DVD master image file.
We have found one software suitable in our database for this conversion.
Apple macOS / Mac OS X software - convert img to cdr on OS X
A program for creating Mac OS X disk images
Convert from img file format
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.