What does the cryptic crossword clue "Some gent when sloshed gets shiner (8)" mean?

The definition is "shiner". The wordplay uses an anagram. anagram of SOME + GENT = GEMSTONE; definition: "shiner" The answer is GEMSTONE.

Some gent when sloshed gets shiner (8)

Independent Cryptic #11470 | 9 Across | 2023-07-17 flower