Possible Clues:

• As many illnesses are, primarily requiring drug in form of a tablet
• A group of non-professional British Soldiers in The Voice deserving of attention in The Theatre?
• A problem the medical orderlies could solve in violent battle era
• Singer keeps a band of volunteers that one can deal with
• Losing footing, go down hard on board? It's not beyond repair
• Outside of tuber, fit for consumption, not deadly
• Like diabetes
• OK for practising on
• Can be handled