The term 'SNAKE, FOR ONE' can be broken down into four crossword solutions: BITER (5 letters), RIVER (5 letters), REPTILE (7 letters), and APOD (4 letters). BITER refers to the fact that snakes are carnivorous animals that use their sharp teeth to bite their prey. RIVER is a reference to the fact that many species of snakes live near or in water, such as rivers, lakes, and swamps. REPTILE is a classification of animals that includes snakes, which have scaly skin and lay eggs. Finally, APOD refers to the fact that some species of snakes are limbless, making them resemble an apodal creature.