The most common and most likely answer to this crossword clue is the 8 letter word SYMPHONY
S
Y
M
P
H
O
N
Y
More clues leading to the result SYMPHONY
- Extremely silly Mozart’s first fake composition
- Variable speed acceptable in extremely showy work
- Work I say succeeded, going over fake
- Easy MPH on your motorbike may show composition
- Extremely shady politician chases darling ignoring wife at last in arrangement
- Initial sponsor returned my spurious orchestral work
- My shop is renovated with extremely nifty work
Buddy explains!

The straight part
We know that "arrangement" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case arrangement = symphony.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 SYMPHONY mean?
SYMPHONY noun- An extended piece of music of sophisticated structure, usually for orchestra.
- An instrumental introduction or termination to a vocal composition.
- Harmony in music or colour, or a harmonious combination of elements.
- A symphony orchestra.