The most common and most likely answer to this crossword clue is the 8 letter word MISNOMER
I've seen this crossword clue in The Guardian
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More clues leading to the result MISNOMER
- Glow-worm for instance chews persimmon — not quietly
- Name initially used in memoirs wrongly?
- Scrooge’s Boxing Day uplifting? That’s not the right word
- Unsuitable term for skinflint carrying no money
- Unsuitable term in sermon I’m changing
- Mean one to take French name — but it’s the wrong one
- Incorrect term for Scrooge receiving no money, originally
- Unsuitable name, ‘Scrooge’, when hoarding no millions
- Incorrect term found in revolutionary theorem on simulation
- What’s in erratum is no mere verbal infelicity
Buddy explains!

The straight part
We know that "Incorrect term" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case incorrect term = misnomer.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 MISNOMER mean?
MISNOMER noun- A use of a term that is misleading; a misname.
- A term that is misleading.
- A term whose sense in common usage conflicts with a technical sense.
- Something asserted not to be true; a myth or mistaken belief
- To use a misleading term; to misname.