What does the cryptic crossword clue "Allow to go and be rude to teacher (7)" mean?

The wordplay uses a charade (building blocks). DIS (synonym="“be rude to”") + MISS (synonym="“teacher”") = DISMISS The answer is DISMISS.

Allow to go and be rude to teacher (7)

Guardian Cryptic #29471 | 15 Across | 2024-08-26 flower