Gangway (5)
I believe the answer is:
aisle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gangway</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for aisle that I've seen before include "Walkway between seats" , "Passageway in church as for bride" , "Passages between seating areas" , "way for prospective union members?" , "Passageway in theatre" .)