Updating populated Linked Field to NULL via Automate.io bot

I have a record that contains a linked field. The linked field is populated with a value. I’m trying to use automate.io to delete the value stored in the linked field. Their support doesn’t seem to a) understand what I’m trying to do, and b) have any idea how to accomplish what I’m trying to do.

In Zapier you simply hit the spacebar three times for a field value that you want to update to NULL. Is anyone aware of something similar in automate.io?