The term 'Sneaky One' can be described by two crossword solutions: WEASEL (6 letters) and Slyfox (6 letters). Weasels are small mammals that belong to the Mustelidae family, which also includes ferrets, badgers, and otters. They are known for their cunning and sly behavior, which is why they are often used as a metaphor for someone who is sneaky or untrustworthy. The term Slyfox is a combination of the words sly and fox, which is another animal known for its cunning and sly behavior. Both terms are used to describe someone who is sneaky or untrustworthy.