The crossword solution for the term UPPER-CLASS GIRL is DEB. This acronym stands for 'DEBUTANTE, ' which is a young woman from an upper-class family who is presented to society at a formal debut. The DEBUTANTE is typically between the ages of 16 and 19 and is usually presented at a ball or other social gathering. The DEBUTANTE is usually dressed in a white gown and is accompanied by her father or another male relative.