Italian composer unsettled by Israeli (7)
I believe the answer is:
salieri
'italian composer' is the definition.
(I've seen this before)
'unsettled by israeli' is the wordplay.
'israeli' can be anagrammed to 'SALIERI'.
But, I am not sure how this is indicated.
Can you help me to learn more?
(Other definitions for salieri that I've seen before include "Rival of Mozart" , "Composer contemporary with Mozart" , "musician accused of murder" , "Italian composer" .)