I enlisted in military group working to build country (6)
I believe the answer is:
nation
'country' is the definition.
(I know that country can be written as nation)
'i enlisted in military group working' is the wordplay.
I cannot quite understand how this works, but
'i' could be 'a' and 'a' is found in the answer.
'working' could be 'on' (e.g. a machine is working or on) and 'on' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'to build' is the link.
Can you help me to learn more?
(Other definitions for nation that I've seen before include "Body of people under one government" , "People sharing a common culture/descent" , "Body of people united by their homeland" , "A federation of tribes, as Native Americans say" , "People of a state" .)