Goad pointer (6)
I believe the answer is:
needle
I believe this is a double definition.
'goad' is the first definition.
('needle' can be a synonym of 'goad')
'pointer' is the second definition.
(needle is a kind of pointer)
(Other definitions for needle that I've seen before include "Compass pointer" , "Long thin leaf of pine tree" , "Sharp instrument" , "Annoy; pine leaf" , "Implement with eye" .)