Board game with Professor Plum (4)
I believe the answer is:
clue
(Other definitions for clue that I've seen before include "Aid to solving" , "What's this" , "Hint; piece of evidence" , "Aid to puzzlers" , "crossword guide" .)
I believe the answer is:
clue
(Other definitions for clue that I've seen before include "Aid to solving" , "What's this" , "Hint; piece of evidence" , "Aid to puzzlers" , "crossword guide" .)