What does the cryptic crossword clue "Scream over tune in production for a long time (7)" mean?

The wordplay uses an anagram. anagram of TUNE (synonym="TUNE") + CRY (synonym="CRY") = CENTURY The answer is CENTURY.

Scream over tune in production for a long time (7)

Guardian Cryptic #29523 | 28 Across | 2024-10-25 flower