Iraqi port city (5)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">iraqi port city</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for basra that I've seen before include "Chief port of Iraq" , "Iraqi port city" , "Iraq's main port" , "Iraqi port on the Shatt-al-Arab waterway" , "Iraqi town" .)