Clear commands

clear
    - screen action-name [owner owner-name]
    - system
        - ptp inactive-peers
        - ptp peer ip-address statistics
        - ptp statistics
            - port port-id statistics
        - script-control
            - script-policy
                - completed [script-policy-name] [owner owner-name]
        - sync-if-timing {ref1 | ref2}
        - sync-if-timing {ref1 | ref2 | bits1 | bits2}