Item often illegally exported from country without coast (5)
I believe the answer is:
ivory
'item often illegally exported' is the definition.
(ivory is often traded illegally)
I don't understand how the remainder of the clue works.
(Other definitions for ivory that I've seen before include "Yellowish white - material from tusks" , "Key perhaps" , "Creamy-white colour" , "on either side of trunk" , "Jumbo's dentine" .)