Covered by Mario Vargas Llosa back in Indian city (4)
I believe the answer is:
agra
'indian city' is the definition.
(city in India)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for agra that I've seen before include "City in India" , "City famous for its Mogul architecture" , "vicinity of mausoleum" , "Site of the TajMahal" , "city founded in 1566" .)