Roving about domain? (7)
I believe the answer is:
nomadic
'roving' is the definition.
(I know that roving can be written as nomadic)
I can't explain the rest of the clue.
(Other definitions for nomadic that I've seen before include "constantly moving" , "Roaming" , "Moving around" , "Wandering from place to place, with no permanent home" , "Migratory" .)