What does the cryptic crossword clue "Proust reinterpreted produces mental dullness (6)" mean?

The definition is "mental dullness". The wordplay uses an anagram. anagram of PROUST = STUPOR; definition: "mental dullness" The answer is STUPOR.

Proust reinterpreted produces mental dullness (6)

Independent Cryptic #10950 | 3 Down | 2021-11-16 flower