Mad aunt is entertaining this writer in the country (7)
I believe the answer is:
tunisia
'country' is the definition.
(Tunisia is an example)
'mad aunt is entertaining this writer' is the wordplay.
'mad' indicates anagramming the letters.
'entertaining' indicates putting letters inside.
'this writer' becomes 'i' (the person who is writing these clues).
'aunt'+'is'='auntis'
'auntis' is an anagram of 'tunsia'.
'tunsia' enclosing 'i' is 'TUNISIA'.
'in the' is the link.
(Other definitions for tunisia that I've seen before include "Country where Carthage is found" , "Somewhere in North Africa" , "As Inuit visits there in North Africa" , "Suit Ian to be in North African country" , "African state" .)