Writer's sources (5)
I believe the answer is:
wells
This clue is a double definition.
'writer's' is the first definition.
(HG Wells)
'sources' is the second definition.
(I know this)
(Other definitions for wells that I've seen before include "Author" , "Oil sources" , "Sources of water" , "Flows upward; small city" , "Cathedral city; sci-fi writer" .)