Chive kin (4)
I believe the answer is:
leek
'chive kin' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for leek that I've seen before include "English town" , "Plant related to the onion, pair with potato for soup" , "Welsh national symbol" , "what Fluellen wore in France?" , "Welsh symbolic vegetable" .)