Trajectory; thoroughfare (4)
I believe the answer is:
path
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">trajectory</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">thoroughfare</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for path that I've seen before include "Way for pedestrians" , "Trodden track" , "trail" , "Track; direction" , "Line of travel" .)