What does the cryptic crossword clue "Trainee most prepared for puppets (11)" mean?

The definition is "puppets". The wordplay uses an anagram. anagram of TRAINEE + MOST = MARIONETTES; definition: "puppets" The answer is MARIONETTES.

Trainee most prepared for puppets (11)

Daily Mail Cryptic #17071 | 19 Across | 2023-04-07 flower