Source of some kitchen tears (5)
I believe the answer is:
onion
'source of some kitchen tears' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for onion that I've seen before include "Edible tear-jerker" , "Pungent edible bulb of the lily family" , "reason for tears" , "one understood by expert" , "Shape of Russian dome" .)