Aunt is rambling around one African country (7)
I believe the answer is:
tunisia
'african country' is the definition.
(country in Africa)
'aunt is rambling around one' is the wordplay.
'rambling' indicates anagramming the letters.
'around' means one lot of letters goes inside another.
'one' becomes 'i' (Roman numeral).
'aunt'+'is'='auntis'
'auntis' with letters rearranged gives 'tunisa'.
'tunisa' going around 'i' is 'TUNISIA'.
(Other definitions for tunisia that I've seen before include "Country between Algeria/Libya" , "African republic on the Mediterranean coast" , "As Inuit visits there in North Africa" , "Land" , "Country where Carthage is found" .)