What does the cryptic crossword clue "Donna's set played soft rock (9)" mean?

The definition is "rock". The wordplay uses an anagram. anagram of DONNA'S + SET = SANDSTONE; definition: "rock" The answer is SANDSTONE.

Donna's set played soft rock (9)

Daily Mail Cryptic #17440 | 14 Down | 2024-09-06 flower