"Time's Arrow" author
I believe the answer is:
amis
'time's arrow author' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for amis that I've seen before include "Author Kingsley or Martin" , "Kingsley, Martin or John" , "Author of Lucky Jim, d.1995" , "Kingsley -, English author (Lucky Jim)" , "Martin --, Eng. author" .)