The very same Italian turned up in Iceland, shivering (9)
I believe the answer is:
identical
'the very same' is the definition.
(I've seen this before)
'italian turned up in iceland shivering' is the wordplay.
'italian' becomes 'it'.
'turned up' is a reversal indicator.
'in' indicates putting letters inside.
'shivering' is an anagram indicator.
'it' back-to-front is 'ti'.
'iceland' with letters rearranged gives 'idencal'.
'ti' inserted into 'idencal' is 'IDENTICAL'.
(Other definitions for identical that I've seen before include "Equal" , "Selfsame" , "Not any different" , "not distinguished" , "Duplicate" .)