Can the CL-xxx be used in the hotshoe of the FlexTT5 rather than a hotshoe adapter plus cable? Does this work for HSS?
No. The CL-xxx only has the center pin on its hot foot. I don't know if the FlexTT5 will fire it with just the center pin. It should fire via a cable from the P mini-jack. And, if I remember correctly that will work to deliver an FP-sync fire signal.
If you are talking about the Nikon version, I presume it works about like the Canon version.




