Divining tool (3)
I believe the answer is:
rod
'divining tool' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rod that I've seen before include "Baton, pole" , "Old saying 'Spare the . . . and spoil the child'" , "Fishing pole" , "16.5 feet" , "Rigid stick" .)