Hint to help the puzzler (4)
I believe the answer is:
clue
'hint to help the puzzler' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for clue that I've seen before include "Helpful hint" , "Crossword help" , "Hint to help the solver" , "Hint towards solution" , "It helps towards the solution" .)