The most common and most likely answer to this crossword clue is the 8 letter word DISAGREE
I've seen this crossword clue in Financial Times
D
I
S
A
G
R
E
E
More clues leading to the result DISAGREE
- New ideas about horse almost conflict
- Police eager to resolve conflict
- Compile grid with ease? No way!
- Insult a short environmentalist in conflict
- Decline to enter dreadful English contest
- Drop in crucial point in conflict
- Pervert said lust reduced conflict
- Take a different view from “Greenland is a green land”
- See a grid set out and argue
- Row makes girl fall about — end of love
Buddy explains!

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 DISAGREE mean?
DISAGREE verb- To fail to agree; to have a different opinion or belief.
- To fail to conform or correspond with.