Geoffrey —, author of The Canterbury Tales buried in Poets' Corner, Westminster Abbey (7)
I believe the answer is:
chaucer
(Other definitions for chaucer that I've seen before include "Early English writer" , "Geoffrey -, fourteenth century poet" , "English poet (1340-1400)" , "Geoffrey . . . . . . ., author of 'The Canterbury Tales'" , "14th-century English poet" .)