What does the cryptic crossword clue "They may have boxers leave when getting into drugs? (3,6)" mean?

The wordplay uses a container (one word inside another). GO (synonym="leave") in DOWNERS (synonym="drugs") = DOGOWNERS The answer is DOGOWNERS.

They may have boxers leave when getting into drugs? (3,6)

Guardian Cryptic #29520 | 18 Across | 2024-10-22 flower