Command group of monks (5)
I believe the answer is:
order
This clue is a double definition.
'command' is the first definition.
(I know that order is a type of command)
'group of monks' is the second definition.
(I've seen this in another clue)
(Other definitions for order that I've seen before include "booking" , "plan to reorganise Europe with 1a [NEW]" , "rule of law" , "Enjoin in harmony" , "demand" .)