Is Greek character one from Italian island? (6)
I believe the answer is:
ischia
'italian island?' is the definition.
(I've seen this before)
'is greek character one' is the wordplay.
'greek character' becomes 'chi' (letter from the Greek alphabet).
'one' becomes 'a'.
'is'+'chi'+'a'='ISCHIA'
'from' acts as a link.
(Other definitions for ischia that I've seen before include "Home of islander" , "Volcanic island in the Bay of Naples" , "Parts of pelvis; isle near Naples" , "Insular offshore location" , "Island at the north end of the Bay of Naples" .)