The answer to the crossword puzzle is AVES, which stands for 'Assorted Valuable Estate Spaces'. This is a reference to the popular board game Monopoly, in which players purchase and trade properties on a game board. The properties are divided into different categories, such as railroads, utilities, and assorted valuable estate spaces. These spaces represent many of the properties that can be purchased in the game, hence the term 'many Monopoly properties'.