The crossword solution for the term TYPE OF BILLING is STAR, which stands for Straight-line Accrual Rate. This type of billing is a method of accounting that records revenue and expenses over a period of time, rather than when they are actually received or paid. It is used to ensure that income and expenses are reported in the same period, even if the cash flow does not match up. This type of billing is commonly used in businesses to ensure accurate financial reporting.