It's bulbous yet skinny (5)
I believe the answer is:
onion
If this is the answer I cannot explain how the clue works.
Can you help me to learn more?
(Other definitions for onion that I've seen before include "associated with 26 [TRIPE] ?" , "Aromatic flavourful versatile vegetable" , "Edible tear-jerker" , "Shape of Russian dome" , "Eye-watering vegetable" .)