National force (5)
I believe the answer is:
power
This could be a double definition.
'national' is the first definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'force' is the second definition.
('power' can be a synonym of 'force')
Can you help me to learn more?
(Other definitions for power that I've seen before include "Supply with energy" , "Ability (to do something)" , "Strength - capacity" , "Military potential" , "Strength or authority" .)