Penned order for silence (4,2)
I believe the answer is:
shut up
'order for silence' is the definition.
(instruction calling for someone to be silent)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for shut up that I've seen before include "Button it!" , "Rude command to stop talking" , "Close your mouth!" , "Hold your tongue" , "close completely?" .)