The term ONE WAY TO BUY can be broken down into four crossword solutions: COD (3 letters), ONTIME (6 letters), ONCREDIT (8 letters), and MAILORDER (9 letters). COD stands for 'cash on delivery' and is a payment method where the customer pays for goods when they are delivered. ONTIME refers to paying for goods at the time of purchase, usually with cash or a debit card. ONCREDIT means buying goods on credit, which involves taking out a loan or using a credit card to pay for the item. Finally, MAILORDER is a type of shopping where customers order goods from a catalog or website and have them delivered to their home.