There seem to be a lot of broken clutch cables reported for the Scout. Unfortunately it is a replacement item, like chain and sprockets on other bikes. They don't all break at the handlebar end of the cable, some of them break where they attach to the other lever at motor end.
It is generally a problem with the angle the cable is expected to deal with - when you pull the lever the cable starts at one angle and ends up at another. This angle means the anchor lug has to turn in its housing. To enable the turn there is a teflon sleeve around it but it still needs lubricating. If it doesn't turn the inner cable has to bend and the steel wire gets work hardened and one day it snaps. On my Scout I noticed that the cable end needed lubricating between services and I used to remove it from the lever and hit it with a slight spray of bike chain lube, the sticky stuff that doesn't wash off in the rain. I think Indian says you should not spray anything down inside the outer cable - probably because it can dry into a gel and increase the load on the lever. Lots of Indian riders say they carry a spare clutch cable, and some go for the more expensive Barnett cable that has a rock solid reputation. In my old dirt bike days we would carry spare inner cable wire with screw-on lugs for emergencies. I've also unsoldered the lug from a broken cable and soldered the new wire into the old lug. It's a simple job once you know how it's constructed. Don't be too hard on Brisans, it might have been any other dealer in the country and the cable could still break.
From Woodrising (no, nobody else has heard of it either) Rides a Springfield Dark Horse