What does the cryptic crossword clue "Harp on about Oliver Twist, maybe (6)" mean?

The definition is "Twist, maybe". The wordplay uses an anagram. anagram of HARP + ON = ORPHAN; definition: "Twist, maybe" The answer is ORPHAN.

Harp on about Oliver Twist, maybe (6)

Daily Mail Cryptic #17477 | 18 Down | 2024-10-29 flower