What does the cryptic crossword clue "French artist is enthralled by representation of steam (7)" mean?

The definition is "French artist". The wordplay uses an anagram. anagram of IS + STEAM = MATISSE; definition: "French artist" The answer is MATISSE.

French artist is enthralled by representation of steam (7)

Daily Mail Cryptic #17130 | 12 Across | 2023-06-29 flower