The Clue Uses Zandu Balm, say
The Answer RUBS
The answer "RUBS" fits the clue because Zandu Balm is a topical ointment that people apply to their skin. When someone uses Zandu Balm, they typically rub it onto the area where they feel pain or discomfort. The action of rubbing helps the balm to penetrate the skin and provide relief. Therefore, "RUBS" is a perfect word to describe what someone does with Zandu Balm.