Mystery-solver's aid (4)
I believe the answer is:
clue
(Other definitions for clue that I've seen before include "Hint towards solution" , "One of twenty-four in this puzzle" , "What's this" , "Aid to solving" , "Intimation (like this?)" .)
I believe the answer is:
clue
(Other definitions for clue that I've seen before include "Hint towards solution" , "One of twenty-four in this puzzle" , "What's this" , "Aid to solving" , "Intimation (like this?)" .)