Like a planet's path (7)
I believe the answer is:
orbital
'like a planet's path' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for orbital that I've seen before include "Of road, circling a town" , "Relating to a planet's or a moon's track" , "circling a large city" , "Boil tar (anag)" , "Describing the M25 motorway?" .)