Letter a country is issuing (9)
I believe the answer is:
emanation
'issuing' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'letter a country' is the wordplay.
'letter' becomes 'em' (I've seen this in other clues).
'country' becomes 'nation' (synonyms).
'em'+'a'+'nation'='EMANATION'
'is' is the link.
Can you help me to learn more?
(Other definitions for emanation that I've seen before include "discharge" , "Something produced from a source" , "produce radioactive gas" , "Pouring out" , "Something given off" .)