Cut off — I will utterly destroy idols and idolatry. The prophets — The false prophets. The unclean spirit — The devil who sets the false prophets to work.
Related Commentaries of Zechariah 13:2
Zechariah 13:2
2 And it shall come to pass in that day, saith the LORD of hosts, that I will cut off the names of the idols out of the land, and they shall no more be remembered: and also I will cause the prophets and the unclean spirit to pass out of the land.