Standing order (9)
I believe the answer is:
attention
This clue might be a double definition.
'standing' is the first definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'order' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for attention that I've seen before include "should be paid to a teller's account?" , "Vigilance; care" , "Special care, soldier's position" , "Awareness - regard" , "Applying the mind, mental concentration" .)