Jelly is a popular dessert made from fruit juice, sugar, and a gelling agent. The crossword solutions for the term 'jelly ingredient' are BERRY (5 letters), Pectin (6 letters), and AGAR (4 letters). Berries are a common ingredient in jellies, providing both flavor and color. Pectin is a natural carbohydrate found in fruits and vegetables that acts as a gelling agent when heated with sugar. AGAR is a vegan alternative to gelatin, derived from seaweed, that is also used as a gelling agent in jellies.