The term 'BILL IN A TILL' can be broken down into two crossword solutions: ONE (3 letters) and TEN (3 letters). The solution for ONE is 'PEN', which is a writing instrument used to write out bills. The solution for TEN is 'DIME', which is a type of coin used to pay for goods and services. Together, these two solutions represent the phrase 'BILL IN A TILL', which is a phrase used to describe the process of paying for goods and services with cash.