Italian collar, I see, is turned over (8)
I believe the answer is:
sicilian
'italian' is the definition.
(I know that Sicilian is a type of italian)
'collar i see is turned over' is the wordplay.
'collar' becomes 'nail' (synonyms).
'see' becomes 'C' (the word for the letter, according to Chambers).
'turned over' says the letters should be written backwards.
'nail'+'i'+'c'+'is'='nailicis'
'nailicis' written backwards gives 'SICILIAN'.
(Other definitions for sicilian that I've seen before include "Person from the Italian island" , "One from Palermo, say" , "Mafioso may be" , "Inhabitant of Island with Mount Etna" , "Native or large island off the toe of Italy" .)