The most common and most likely answer to this crossword clue is the 9 letter word SEGREGATE
I've seen this crossword clue in The Guardian
S
E
G
R
E
G
A
T
E
More clues leading to the result SEGREGATE
- Separate Easter egg roughly
- Don’t join ‘Easter Egg’ movement
- Split up and get grease monkeys around
- To isolate grease, get liquid
- Isolate and get grease off
- Cracked Easter egg for 26?
- . Players, in front of Chappell, perhaps had to separate
- Gregory filling chair Earl initially set apart
- Broken Easter egg must be set apart
- Separate rotten Easter egg
Buddy explains!

The straight part
We know that "Separate" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case separate = segregate.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 SEGREGATE mean?
SEGREGATE verb- To separate, especially by social policies that directly or indirectly keep races or ethnic groups apart.
- Separate; select.
- Separated from others of the same kind.
- Separate from a mass and collected together along lines of fraction.