Tehran's country (4)
I believe the answer is:
iran
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tehran's country</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 "Country where ayatollahs replaced a shah" , "Modern-day Persia" , "Persia some time ago" , "Nation" , "Iraq's neighbour" .)