Puzzling questions (7)
'puzzling questions' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for riddles that I've seen before include "Funny little teasers" , "Puzzling questions" , "Word games or sieves" , "Puzzles and mysteries" , "useful for coarse sorts?" .)
(Other definitions for teasers that I've seen before include "Tricky questions" , "Difficult problems or people who chaff" , "Problems that are difficult to solve" , "Puzzles" , "Steers a way with riddles" .)