Country’s mark — limitless wide area network (6)
I believe the answer is:
taiwan
'country's' is the definition.
The definition and answer can be both locations as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'mark limitless wide area network' is the wordplay.
'mark' becomes 'stain' (synonyms).
'limitless' means to look at the middle letters.
'wide area network' becomes 'wan' (this might be a standard abbreviation I've not previously seen).
The central letters of 'stain' are 'tai'.
'tai'+'wan'='TAIWAN'
Can you help me to learn more?
(Other definitions for taiwan that I've seen before include "Formerly Formosa" , "Republic of China" , "Non-mainland China" , "Island country, formally called Formosa" , "Former Formosa" .)