Salad stalk (6)
I believe the answer is:
celery
'salad stalk' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for celery that I've seen before include "Plant with succulent leaf stalks" , "Stick vegetable" , "Plant eaten cooked or raw" , "Salad item or cooked vegetable" , "The crunch matter for slimmer" .)