Pungent-tasting bulb (6)
I believe the answer is:
garlic
'pungent-tasting bulb' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for garlic that I've seen before include "Flavouring bulb" , "Aromatic bulb used as seasoning" , "Kitchen additive" , "Pungent bulbs" , "Vegetable" .)