"what does the deputy clerk do"

There is a Deputy Clerk in both the Senate and the House of Representatives. Like the Clerks, the Deputy Clerks are non-elected officials who help the President of the Senate or the Speaker of the House of Representatives run proceedings. They also record the actions and decisions of the Senate and House and assist with ceremonial occasions, such as the opening of Parliament and the swearing-in of new members of parliament.

You can find out more about the role of the Clerks and Deputy Clerks with this fact sheet. 

diagram to help explain what does the deputy clerk do