Use divining rod (5)
I believe the answer is:
dowse
'use divining rod' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for dowse that I've seen before include "Look for water with a divining rod" , "Search for water using hazel rod" , "try to find water" , "Extinguish" , "Detect underground water" .)