The term 'Mischievous Kid' can be described by three crossword solutions: IMP (3 letters), ELF (3 letters), and DEMON (5 letters). An IMP is a small, mischievous creature from folklore, often depicted as a small DEMON or goblin. Elves are supernatural beings in Germanic mythology and folklore, usually depicted as small, human-like creatures with magical powers. Demons are supernatural beings in various religions and mythologies, often depicted as malevolent entities that can cause harm to humans. All three of these creatures are commonly associated with mischief and can be used to describe a mischievous kid.