The term 'Sidewalk Stand Purchase' refers to a transaction that takes place when someone buys something from a stand on the side of the street. In this case, the solutions for the crossword are 'ADE' and 'LEMONADE', indicating that the purchase was likely a cup of LEMONADE. This type of purchase is common in many cities, as it provides an opportunity for entrepreneurs to make money by selling their goods on the sidewalk.