The crossword solution for the term VALUABLE OIL, SAY is ART. This is an abbreviation for the term 'aromatherapy, ' which is the practice of using essential oils to promote physical and psychological well-being. Essential oils are extracted from plants and have been used for centuries in various cultures for their healing properties. They are highly concentrated and can be used in a variety of ways, including massage, inhalation, and topical application. Aromatherapy is becoming increasingly popular as a holistic approach to health and wellness.