Planet's path (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
orbit
'planet's path' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for orbit that I've seen before include "Stellar path" , "fly in a circle" , "Path of planet around sun" , "Circumnavigate" , "Sphere of activity" .)