The term 'Wild Donkey' can be broken down into two crossword solutions: ONAGER (6 letters) and ASS (3 letters). An ONAGER is a species of wild donkey native to the deserts of Iran, Pakistan, and India. It is the last surviving member of the subgenus Equus, which includes all other wild donkeys. The ASS is a domesticated donkey, which is a descendant of the ONAGER. It is used for transportation, labor, and companionship.