A clone advisor was a clone trooper who served as an advisor to a Clone Commando squad. Their duty was to inform the squad about their missions, status, and objectives.
Behind the scenes[]
The exact nature of this role is currently unknown. It may be that it is an official position within the Grand Army of the Republic, or it may be simply a position that is filled by a qualified trooper as the need arises. It is not clear if all clone commando squads used a clone advisor, but the known example that did use one did not do so for all of their missions.