Roasting rod (4)
I believe the answer is:
spit
'roasting rod' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for spit that I've seen before include "hawk" , "Skewer; headland" , "Narrow point of land; saliva" , "Eject from mouth" , "bird's place in front of the fire?" .)