The term '10 Gold Piece' is a reference to a type of coin that was used in the United States from 1795 to 1933. The coin was made of 90% gold and 10% copper, and it was worth $10 in US currency. The crossword solution for this term is 'EAGLE, ' which is a reference to the design on the front of the coin. The obverse of the coin features an EAGLE with its wings spread, holding an olive branch and arrows in its talons.