The two crossword solutions for the term 'Perfumery Ingredient' are ESTER (5 letters) and Nerol (5 letters). Esters are a class of organic compounds derived from carboxylic acids and alcohols. They are used in perfumery as they have a pleasant smell and are often used to create fragrances. Nerol is an aromatic alcohol found in many essential oils, such as neroli, lemon, and orange. It is used in perfumery to add a sweet, floral scent to fragrances.