Wow, I never would have guessed that they moved that feature to the subscription-only product. My apologies for the misleading statements in my earlier posts.
You can still do what I suggested but it will take a couple extra steps, and I completely understand how frustrating it is that you can't simply combine the two sections of the clip.
The way to do this without Produce Range would be to select and copy the 2 clip sections, then save the project and use File > New Workspace to create a clear timeline with all your media library files intact. Paste the clips on the timeline and procede to produce the whole project (which is simply your clip sections).
You can then reopen your main project and import the new clip, then replace the exisiting separate clips on your timeline with the new version and use the C/Z/P tool.