What does the cryptic crossword clue "I’m sincere in drink, remember? (9)" mean?

The definition is "remember?". The wordplay uses an anagram. anagram of I’M + SINCERE = REMINISCE; definition: "remember?" The answer is REMINISCE.

I’m sincere in drink, remember? (9)

Independent Cryptic #11999 | 11 Across | 2025-03-25 flower