What does the cryptic crossword clue "Sonata perhaps features in Mozart for Maestros (3,4)" mean?

The definition is "Sonata perhaps". The wordplay uses a hidden word. hidden in "Mozart for Maestros" The answer is ARTFORM.

Sonata perhaps features in Mozart for Maestros (3,4)

Guardian Cryptic #27096 | 12 Across | 2017-01-17 flower