The most common and most likely answer to this crossword clue is the 6 plus 3 letter word SPREAD OUT
I've seen this crossword clue in Independent
S
P
R
E
A
D
O
U
T
More clues leading to the result SPREAD OUT
- Sumptuous picnic, evidently extended
- Maybe drapes move apart
- Picnic in lounge?
- Cover a wider area — might that be suggested by padres?
- Picnic over a wide area?
- Shoot around study and scatter
- Widely distributed Spanish display of data
- Distribute Spanish information from a computer
- Spanish data display opened for viewing
Buddy explains!

The straight part
We know that "move apart" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case move apart = spread out.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.