I've never had a clutch cable break on me in over 55,000 Speedster miles but always dreaded it ever happening on the road. Well two Carlises ago the cable didn't break but the wing nut holding the clutch cable just disintegrated as we were leaving the Country Club for dinner on the first night. Examining the scattered pieces it was apparent that the wing nut was just some kind of cheap Chinese pot metal. Total junk, and I'm surprised it lasted as long as it did. I had a spare solid steel machined wingnut in my supplies and was able to fix it on the spot. When I returned home I screwed a second wingnut behind the one on the car as a safety feature and don't ever give it a thought anymore. I have lubed that cable 2-3 times over the almost 14 years I've owned the car and the cable always looks like new.
So check the wing nut on your car and if it's pot metal, replace it with one or two steel ones.
It might be helpful to start a "Hints and kinks" forum for ideas like this. I learned how to install a spare wire engine cover release from this site---another example of something for a Hints and Kinks forum. There must be dozens and dozens of ideas that would help the Speedster grief factor and it would be nice to have them in one place within the SOC.