The term 'ONE OF THE GREATS' can be represented by six different crossword solutions: Peter (5 letters), ALFRED (6 letters), Peteri (6 letters), Erie (4 letters), IVAN (4 letters), and OTTO (4 letters), Huron (5 letters). Peter is likely referring to Peter the Great, who was the Tsar of Russia from 1682-1725 and is considered one of the greatest rulers in Russian history. ALFRED is likely referring to ALFRED the Great, who was the King of Wessex from 871-899 and is credited with unifying England and establishing a legal system. Peteri is likely referring to Peter I of Serbia, who reigned from 1903-1918 and is credited with modernizing Serbia. Erie is likely referring to Lake Erie, which is the fourth largest of the five Great Lakes of North America. IVAN is likely referring to IVAN the Terrible, who was the first Tsar of Russia from 1547-1584 and is known for his extreme cruelty. OTTO is likely referring to OTTO von Bismarck, who was the first Chancellor of Germany from 1871-1890 and is credited with unifying Germany. Finally, Huron is likely referring to Lake Huron, which is the second largest of the five Great Lakes of North America.