The term 'NICE ROUND FIGURE' can be solved by two crossword solutions: 'CIRCLE' (6 letters) and 'COOLMILLION' (11 letters). A CIRCLE is a two-dimensional shape with no beginning or end, and is often used to represent completeness. A cool million is a slang term for one million dollars, which is a large sum of money. Therefore, the phrase 'NICE ROUND FIGURE' can be interpreted as a complete and impressive amount of money.