Island noise interrupting end of wondrous song (8)
I believe the answer is:
sardinia
'island' is the definition.
(Sardinia is an example)
'noise interrupting end of wondrous song' is the wordplay.
'noise' becomes 'din' (din is a kind of noise**).
'interrupting' means one lot of letters goes inside another.
'end of' says to take the final letters.
'song' becomes 'aria' (aria is a kind of song).
The final letter of 'wondrous' is 's'.
's'+'aria'='saria'
'din' placed into 'saria' is 'SARDINIA'.
(Other definitions for sardinia that I've seen before include "Adrian is seen in Mediterranean island" , "Island belonging to Italy" , "Corsican neighbour" , "Large Italian island, capital Cagliari" , "Island south of Corsica" .)