Riddle of the kitchen? (5)

I believe the answer is:

sieve

I'm a little stuck... Click here to teach me more about this clue!

'riddle' is the definition.
(I know that riddle is a more specific form of the action sieve)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for sieve that I've seen before include "Colander" , "Fine riddle" , "Craft for Jumblies" , "Utensil with meshed bottom" , "particle separator" .)

I've seen this clue in The Mirror.

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