Novelist McEwan perhaps upset converted Christian (7)

I believe the answer is:
naipaul
'novelist' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for naipaul that I've seen before include "Sir V. S. -, Br. author" , "Author of In a Free State" , "V. S. -, two thousand and one Nobel Prize author" , "V. S. - , novelist (A House for Mr Biswas)" , "Sir V.S. --, author" .)
