Small onion (7)
I believe the answer is:
shallot
'small onion' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for shallot that I've seen before include "Edible onion-like bulb" , "Type of onion" , "Species of onion" , "Small onion-like bulb used for seasoning" , "found in the allotment" .)