The term 'steamed pudding ingredient' can be solved by two crossword solutions: SUET (4 letters) and SAGO (4 letters). SUET is a type of hard fat found around the kidneys and loins of animals such as beef, sheep, and mutton. It is used in traditional British dishes such as steamed puddings, dumplings, and mincemeat pies. SAGO is a starch extracted from the spongy center, or pith, of various tropical palm stems. It is often used to thicken sauces, soups, and desserts, and is a common ingredient in steamed puddings.