Neighbor of Turkmenistan (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">neighbor of turkmenistan</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for iran that I've seen before include "Middle East Islamic republic" , "Tehran is its capital" , "Rain (anag) - country" , "Country of western Asia" , "Islamic republic on the Persian Gulf" .)