Subterranean plant organ (4)
I believe the answer is:
bulb
(Other definitions for bulb that I've seen before include "Light fitting" , "Source of flower or light" , "Growing source" , "swelling" , "Eg, hyacinth" .)
I believe the answer is:
bulb
(Other definitions for bulb that I've seen before include "Light fitting" , "Source of flower or light" , "Growing source" , "swelling" , "Eg, hyacinth" .)