Have installed gconf-editor in loki but the only app showing is gconf-editor. How can I access the other folders? (I would like to hide the clock from the wingpanel)
Try installing dconf-editor instead, I get plenty more folders in there.
Also, if you want to hide the indicator totally (date AND time), open terminal and run:
sudo apt remove wingpanel-indicator-datetime
(If you want to get it back, do:
sudo apt install wingpanel-indicator-datetime
