What does the cryptic crossword clue "Stone Sour quiet for a change (9)" mean?

The definition is "Stone". The wordplay uses an anagram. anagram of SOUR + QUIET = TURQUOISE; definition: "Stone" The answer is TURQUOISE.

Stone Sour quiet for a change (9)

Independent Cryptic #12063 | 14 Down | 2025-06-07 flower