The term 'Rascally Child' can be broken down into two crossword solutions: 'URCHIN' (6 letters) and 'BRAT' (4 letters). An URCHIN is a street child, often homeless and living in poverty. The term is derived from the Middle English word 'erchoun, ' which means hedgehog. A BRAT is a mischievous child who behaves badly and often disobeys authority figures. The term is derived from the Middle English word 'bratte, ' which means rag or tattered garment. Both terms are used to describe a rascally child who is unruly and disobedient.