The most common and most likely answer to this crossword clue is the 8 letter word CREDIBLE
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More clues leading to the result CREDIBLE
- Worth buying what food is on credit
- Case of cider safe to consume — honest!
- Apparently true conservative Republican can be taken in
- Plausible that cheddar rind can be eaten
- Convincing conclusions of diplomatic dossier fit for public consumption
- Skin of cucumber safe to eat, easy to swallow
- Cheddar’s rind, palatable and easy to swallow
- Pair of critics characterising food as trustworthy
- Trustworthy journalist in bed with the French
Buddy explains!

The straight part
We know that "Convincing" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case convincing = credible.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.
What does CREDIBLE mean?
CREDIBLE adjective- Believable or plausible.
- Authentic or convincing.