What does the cryptic crossword clue "I’m not prepared to come out with this (2-3)" mean?

The definition is "I’m not prepared to come out with this". The wordplay uses a cryptic definition. Cryptic definition The answer is ADLIB.

I’m not prepared to come out with this (2-3)

Guardian Cryptic #29471 | 9 Across | 2024-08-26 flower