What does the cryptic crossword clue "It was not I who made that remark, I agree (3,4,2)" mean?

The definition is "It was not I who made that remark, I agree". The wordplay uses a double definition. Double definition The answer is YOUSAIDIT.

It was not I who made that remark, I agree (3,4,2)

Guardian Cryptic #29184 | 14 Down | 2023-09-25 flower