The term 'SLIPPERY ONE' can be solved by four different crossword solutions: LAMPREY (7 letters), EEL (3 letters), ELM (3 letters), and Eluder (6 letters). Lampreys are a type of fish that have a jawless, EEL-like body and are found in both fresh and salt water. Eels are elongated fish that live in the ocean and some freshwater habitats. ELM is a type of tree that is native to Europe, Asia, and North America. Eluder is a verb meaning to evade or escape from someone or something. All of these words describe something that is slippery and difficult to catch, making them all suitable solutions for the term 'SLIPPERY ONE'.