Clear the command entered in a Terminal on Mac Ctrl+U and Ctrl+C

 example:

 xyz-mac:~user: mac abc/vbs/vjbad/jkbsjkn/skdnasldn/sdjkkjbasdb

Lets say you want to clear this on a Mac terminal.

Use : Ctrl + U or Ctrl + C

 Note: Use Ctrl key not Command key

 Source: https://superuser.com/questions/192490/clear-command-from-terminal-in-os-x

 Additional Keys:

Ctrl+K clears the screen 

https://osxdaily.com/2006/12/19/command-line-keyboard-shortcuts-for-mac-os-x/