The puzzle of the kitchen? (6)
I believe the answer is:
riddle
'the puzzle' is the definition.
(a riddle is a puzzle or problem)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for riddle that I've seen before include "Puzzling question - sieve" , "It may have an answer" , "sort out" , "mystery" , "Ingenious puzzle - sieve" .)