The most common and most likely answer to this crossword clue is the 10 letter word ANGLOPHOBE
I've seen this crossword clue in The Times
A
N
G
L
O
P
H
O
B
E
Buddy explains!
The straight part
We know that "hating some Brits" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case hating some brits = anglophobe.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 ANGLOPHOBE mean?
ANGLOPHOBE noun- A person who hates or fears (or has an aversion to) England, its people or anything English.