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