Grade Downgrade is a term used to describe the process of reducing the quality or value of something. It is often used in the context of education, where it refers to the lowering of a student's grade due to poor performance or other factors. The crossword solutions for the term GRADE DOWNGRADE are MINUS, which is a mathematical operation that subtracts one number from another. This is an appropriate solution as it reflects the idea of reducing the quality or value of something.