What does the cryptic crossword clue "Don’t stop thinking of teacher receiving fine (5,2)" mean?

The wordplay uses a container (one word inside another). WELL (synonym="fine") in DON (synonym="teacher") = DWELLON The answer is DWELLON.

Don’t stop thinking of teacher receiving fine (5,2)

Guardian Cryptic #29442 | 25 Across | 2024-07-23 flower