What does the cryptic crossword clue "One composer and another shortly visiting down under (7)" mean?

The wordplay uses a charade (building blocks). BERLI (synonym="BERLI") + OZ (synonym="‘down under’") = BERLIOZ The answer is BERLIOZ.

One composer and another shortly visiting down under (7)

Guardian Cryptic #29587 | 1 Down | 2025-01-09 flower