Payable Immediately is a term used in accounting to describe an obligation that must be paid immediately. It is usually used to refer to a debt or invoice that is DUE and must be paid right away. The crossword solution for this term is 'DUE', which is a three-letter word meaning 'owed or owing'. Payable Immediately is an important concept in accounting, as it ensures that all debts are paid in a timely manner.