Deleting Multicast Forwarding Entries

You can clear one or more forwarding entries from the multicast routing table. However, if you do so, the entries might reappear in the routing table if they are rediscovered.

clear ip mroute

Use to delete IPv4 multicast forwarding entries.
If you specify an *, the router clears all IP multicast forwarding entries.
If you specify the IPv4 address of a multicast group, the router clears all multicast forwarding entries for that group.
If you specify the IPv4 address of a multicast group and the IPv4 address of a multicast source, the router clears the multicast forwarding entry that matches that group and source.
Example
host1:boston#clear ip mroute *
There is no no version.
See clear ip mroute.