The most common and most likely answer to this crossword clue is the 8 letter word SARDINIA
I've seen this crossword clue in The Daily Telegraph
S
A
R
D
I
N
I
A
More clues leading to the result SARDINIA
- Island noise interrupting end of wondrous song
- Island doctor turns up to be imprisoned in Asia, unexpectedly
- Police raids in a remote part of Italy
- Adrian is travelling around island
- Fish restricted area around island, one in Med
- Where one finds Italians beginning to sing song to drown noise
- Rain said to drift in island
- Island Iran said should be destroyed
- Island lair overlooking more than one lake disturbed Corsican neighbour
- Endless noise — breaking into a song on the island
Buddy explains!

The straight part
We know that "island" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case island = sardinia.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.