Shallot, for one (4)
I believe the answer is:
bulb
'shallot for one' is the definition.
(shallot is a kind of bulb)
This is the entire clue.
(Other definitions for bulb that I've seen before include "daffodil here" , "Underground storage organ for some plants" , "Corm; electric light" , "Flower seed or lighting device" , "Tulip, for example" .)