Riddle (5)
'riddle' is the definition.
(I know that riddle can be written as enigma)
This is all the clue.
(Other definitions for enigma that I've seen before include "Difficult problem" , "Solution to mystery" , "Mystery U puzzle" , "Conundrum" , "Mysterious person" .)
'riddle' is the definition.
(I know that riddle can be written as conundrum)
This is all the clue.
(Other definitions for conundrum that I've seen before include "Difficult problem" , "Puzzle, riddle" , "Puzzling problem" , "That's puzzling" , "anagram" .)
'riddle' is the definition.
(riddle can mean to sieve or sift)
This is all the clue.
(Other definitions for sift that I've seen before include "Riddle, sieve" , "Pass though a sieve" , "Distinguish as with a riddle" , "Remove lumps from, eg, flour" , "Put through a sieve" .)
'riddle' is the definition.
(I know that riddle is a kind of sieve)
This is the entire clue.
(Other definitions for sieve that I've seen before include "Utensil for straining or sifting food" , "Jumblies' vessel" , "Device for separating lumps" , "Fine riddle" , "Colander" .)
'riddle' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for mystery that I've seen before include "Type of play" , "Something difficult to understand" , "Something strange and inexplicable" , "Unexplained phenomenon" , "thriller" .)