The term 'Save it for a Rainy Day' is a common phrase used to encourage people to save money or resources for a time when they may be needed. The crossword solution for this term is TARP, which stands for 'Troubled Asset Relief Program'. This was a program created by the United States government in 2008 to help stabilize the economy during the financial crisis. It provided funds to banks and other financial institutions to help them recover from the crisis.