Ring road (7)
I believe the answer is:
orbital
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ring road</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 orbital that I've seen before include "Revolutionary" , "kind of motorway" , "Circuitous" , "Of a planetary path" , "(Of road) skirting town" .)