Mediterranean island — Romanic, surprisingly (7)
I believe the answer is:
minorca
'mediterranean island' is the definition.
(I know that Minorca is a island)
'romanic surprisingly' is the wordplay.
'surprisingly' indicates anagramming the letters (a surprising ordering of the letters).
'romanic' anagrammed gives 'MINORCA'.
(Other definitions for minorca that I've seen before include "One of Balearic islands" , "Balearic island (Eng. sp.)" , "Balearic island; O, cram in (anag.)" , "Land in Balearics" , "holiday island" .)