The term 'Ordeal for Troy' refers to the 10-year SIEGE of the city of Troy by the Greeks, as described in Homer's epic poem The Iliad. The crossword solution for this term is 'SIEGE, ' which is a military tactic used to surround and isolate a city or other area in order to force its surrender. The SIEGE of Troy was one of the most famous sieges in history, and it ultimately resulted in the destruction of the city.