Sphere of action (5)
'sphere of action' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for orbit that I've seen before include "Rotating path" , "Circumgyration" , "Circling path" , "Go round" , "heavenly passage" .)
'sphere of action' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for arena that I've seen before include "Field of combat" , "centre of conflict" , "battlefieId" , "Ring; stadium" , "Entertainments venue" .)