Roundabout route (5)
(Other definitions for orbit that I've seen before include "revolutionary course" , "Circle - influence" , "Rotating path" , "field of activity" , "Planet's course" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">roundabout route</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for detour that I've seen before include "Indirect route" , "A way round, say, road works" , "Deviation from direct course" , "Temporary route" , "Deviation from the usual route" .)