What does the cryptic crossword clue "Youngster knocking over girl's pint (9)" mean?

The definition is "Youngster". The wordplay uses an anagram. anagram of GIRL'S + PINT = STRIPLING; definition: "Youngster" The answer is STRIPLING.

Youngster knocking over girl's pint (9)

Times Cryptic #28879 | 16 Down | 2024-04-01 flower