What does the cryptic crossword clue "Funereal music, say, in cathedral (5)" mean?

The wordplay uses a container (one word inside another). EG (synonym="say") in ELY (synonym="cathedral") = ELEGY The answer is ELEGY.

Funereal music, say, in cathedral (5)

Independent Cryptic #12005 | 10 Across | 2025-04-01 flower