clear policy qos <interface-name>
Clears all the QoS counters on a particular interface or VIF (that is, resets them to zero).
policy- This keyword exists for 'organizational' purposes only, to structure the configuration path for relevant command strings.
qos <interface-name>The name of the interface that has the QoS policy attached that you wish to clear or show.
For more, see qos <interface-name>.