Possible Clues:

• Soothing medicine for lamb
• It comforts, soothes
• Bush spoke of a nuclear weapon, perhaps, which is soothing
• A soothing influence on lamb
• Redolent rub-on
• Aromatic substance used in soothing and healing
• Counterirritant, e.g
• Retro science facility, source of medicinal lotion
• Nonoral analgesic
• See 38-Across