US west coast port (7)
I believe the answer is:
seattle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">us west coast port</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for seattle that I've seen before include "U S west coast city" , "American city" , "Largest city in the state of Washington" , "Washington port" , "city in north-west America" .)