Produce from area within Mediterranean island (6)
I believe the answer is:
create
'produce' is the definition.
(thesaurus)
'area within mediterranean island' is the wordplay.
'area' becomes 'a' (maths abbreviation).
'within' indicates putting letters inside.
'mediterranean island' becomes 'crete' (I've seen this before).
'a' placed within 'crete' is 'CREATE'.
'from' acts as a link.
(Other definitions for create that I've seen before include "Devise" , "found" , "Make a fuss (colloq.)" , "make a scene" , "Come up with" .)