Which advisory indicates that the potential conflict has been resolved?

The advisory "CLEAR OF CONFLICT" is used in aviation communication to indicate that a previously identified potential conflict between aircraft has been resolved. This term specifically assures pilots that they are no longer in jeopardy of a collision and can proceed with their flight as planned. It is a clear and definitive communication that confirms safety and allows pilots to operate without the immediate concern of nearby traffic conflicts.

In contrast, the other advisories represent different situations. "TRAFFIC, TRAFFIC" alerts pilots to the presence of nearby traffic which could pose a risk, but does not confirm resolution of any conflict. "DESCEND, DESCEND, DESCEND" and "CLIMB, CLIMB, CLIMB" are command advisories related to altitude changes that might be issued in response to a conflict, but they do not indicate that the conflict has been resolved. Thus, "CLEAR OF CONFLICT" is the appropriate advisory for confirming the resolution of potential hazards between aircraft.