Country on the Caspian (4)
I believe the answer is:
iran
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">country on the caspian</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for iran that I've seen before include "Country of western Asia" , "Middle East country" , "Country where ayatollahs replaced a shah" , "Modern name for Persia" , "Farsi-speaking country" .)