The term 'SPARING NO EXPENSE' can be summarized by two crossword solutions: RICHLY (6 letters) and WHATEVERTHECOST (15 letters). This phrase is often used to describe someone who is willing to spend a lot of money on something, without worrying about the cost. It implies that the person is not concerned with being frugal or economical, but instead is willing to pay whatever it takes to get what they want.