So I installed 10.12 (new CCC preview driver) and had the bad flickering again. I was going to edit the default profile, but the only clock references I saw were for Overdrive, and I couldn't even figure out how to add a profile for clocks as in the old CCC.
Also, I had lots of trouble getting the CCC to function. It would open once, then fail to close properly (Windows would ask if it shutdown abnormally) and then I couldn't get it to open again without a reboot.
So, back to 10.10...