Feed the furnace in this town (5)
I believe the answer is:
stoke
I believe this clue is a double definition.
'feed the furnace' is the first definition.
(I've seen this in another clue)
'this town' is the second definition.
'in' acts as a link.
(Other definitions for stoke that I've seen before include "Where pottery is made" , "Add coal to (a fire)" , "keep the furnace going" , "Scene of Gray's country churchyard" , "Add fuel to" .)