Marilynne —, author of 2004 novel Gilead; winner of the 2005 Pulitzer Prize for Fiction (8)
I believe the answer is:
robinson
(Other definitions for robinson that I've seen before include "Forename of literary castaway" , "'The Swiss Family - - ' novel" , "So inborn is Mary, Irish ex-President" , ". . . . . . . . Crusoe, Swiss Family . . . . . . . ." , "Castaway on desert island" .)