Nation made me put information in Non-Disclosure Agreement (5)
I believe the answer is:
india
'nation' is the definition.
(India is an example)
'me put information in non-disclosure agreement' is the wordplay.
'me' becomes 'I'.
'put' means one lot of letters go next to another.
'information' becomes 'i' (common abbreviation for information).
'in' is an insertion indicator.
'non-disclosure agreement' becomes 'NDA' (legal abbreviation).
'i' going into 'nda' is 'ndia'.
'i'+'ndia'='INDIA'
'made' acts as a link.
(Other definitions for india that I've seen before include "Commonwealth country, independent in 1947" , "where to ring for help?" , "Large Asian republic" , "Large subcontinent of Asia" , "Second most populous country in the world" .)