The most common and most likely answer to this crossword clue is the 4 plus 2 plus 7 letter word TELL ME ANOTHER
T
E
L
L
M
E
A
N
O
T
H
E
R
More clues leading to the result TELL ME ANOTHER
- Nonsense! Lines mean nothing - rope binds
- I want to hear one more joke? Yeah, right!
- All meet after disruption, one woman excepted? I don’t believe it
- I’m not convinced lines signify nothing when bounded by restraint
- You won’t convince Elgar with that, let alone Mr T
- What child may say after bedtime story? I don’t believe a word of it!
Buddy explains!

The straight part
We know that "I’m not convinced" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case i’m not convinced = tell me another.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.