How to enable x forwarding to SSH

I am running dietpi on Allo Usbridge and I have installed Clementine music player on the sbc. I am thinking on accessing the sbc headless by forwarding the desktop to the connecting SSH terminal at Ubuntu pc. Could someone guide me how to do this? I have followed the instructions given in :

However, the desktop still outputted to hdmi tv monitor instead of SSH terminal.

Ooops! I am sorry, it is my bad. I actually got it working fine, I should direct run “clementine &” not “startx &”. I thought I have to run startx first before I can run Clementine.