Narrow passageway (5)
I believe the answer is:
alley
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">narrow passageway</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 alley that I've seen before include "Walk" , "Narrow back street" , "Narrow passageway" , "Bowling lane" , "Narrow lane; type of cat" .)