Different, Iceland? It is the same! (9)
I believe the answer is:
identical
'is the same' is the definition.
(I've seen this before)
'different iceland? it' is the wordplay.
'different' indicates anagramming the letters (letters placed in a different order).
'iceland'+'it'='icelandit'
'icelandit' with letters rearranged gives 'IDENTICAL'.
(Other definitions for identical that I've seen before include "Not any different" , "Equal" , "lacking distinction" , "uniform" , "showing no change" .)