What does the cryptic crossword clue "Busy art dealer finally flogged gem (4,4)" mean?

The definition is "gem". The wordplay uses an anagram. anagram of BUSY ART R = STAR RUBY; definition: "gem" The answer is STAR RUBY.

Busy art dealer finally flogged gem (4,4)

Times Cryptic #28641 | 16 Down | 2023-06-28 flower