Onion-like plant (7)
I believe the answer is:
shallot
'onion-like plant' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for shallot that I've seen before include "salad vegetable" , "Small onion" , "Rowing boat" , "Small onion-like bulb used for seasoning" , "Onion-like plant with clusters of bulbs" .)