You can inspect the cable connection by removing the filler plug on the gear box.
The clutch actuating 'arm' that the cable connects to is what changes the pulling motion of the cable to a pushing motion on the thrust pin that moves the clutch in/out. This is the adjustment behind the 5 SPEED oval that was described earlier. These adjustments are very subtle when compared to your cable problem, so I would say you had both.
I know that there is a school of thought that you need to be in gear ready to move while at a stoplight, but with an Enfield I'm developing a habit of coming to neutral from second (light touch down or you'll end up in first) when coming to a stoplight. You'll find this much easier than walking the bike forward in order to find neutral when stopped.
I have not figured out what to do when stopped at the top of a hill and need to hold the bike with rear brake, shift to first, let out the clutch, give it gas, not stall, and not get creamed by the person turning left in front of me. I do it every day, but never the same way. I'm sure I look like an idiot. Right foot down, left foot down, right foot down, left foot down, now GO! :-)