Port of Lebanon (4)
I believe the answer is:
tyre
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">port of lebanon</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 tyre that I've seen before include "Biblical town" , "Wheel cover, may be tubeless" , "Rubber ring on a wheel" , "Something with a tread" , "Rubber wheel-ring" .)