The term 'Six-Legged Critter' can be broken down into two crossword solutions: ANT (3 letters) and INSECT (6 letters). An ANT is a type of INSECT, and all insects have six legs. Ants are social insects that live in colonies and are known for their hard work and cooperation. Insects are the most diverse group of animals on Earth, with over one million species identified. They play an important role in the environment by providing food for other animals, pollinating plants, and helping to break down organic matter.