Crossword Genius

Tear-jerker set in kitchen? (5)

Ross

I believe the answer is:

onion

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'tear-jerker' is the definition.
(cutting onions can make you cry)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for onion that I've seen before include "Plant with edible bulb" , "Eye-watering vegetable" , "Shape of Russian dome" , "Tear-jerking bulb" , "Bulb used in cooking" .)

I've seen this clue in The Mirror.
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