Revolving around another object (8)
I believe the answer is:
orbiting
'revolving around another object' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for orbiting that I've seen before include "Travelling around" , "In a kind of revolution" , "as the moon is?" , "Going around in circles - is It boring?" , "Going round in circles" .)