Roadside (4)
I believe the answer is:
kerb
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">roadside</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 kerb that I've seen before include "Roadway edge" , "Stone edging to footpath" , "Roadside" , "stone by the way" , "Pavement edging" .)