Go from a Mediterranean Island (7)
I believe the answer is:
excrete
'go' is the definition.
'from a mediterranean island' is the wordplay.
'from' becomes 'ex'.
'a mediterranean island' becomes 'crete' (I've seen this before).
'ex'+'crete'='EXCRETE'
(Other definitions for excrete that I've seen before include "Expel (waste) from the body" , "Defecate" , "Eliminate (from the body)" .)