The term 'not make the grade' is a phrase that is used to describe someone or something that has not achieved the required standard. The crossword solution for this phrase is 'FAIL', which is a four-letter word. This phrase is often used in educational contexts, where students are expected to meet certain standards in order to pass their courses. It can also be used in other contexts, such as job interviews, where applicants must demonstrate that they have the necessary skills and qualifications to be successful.