
1) Brassica napus 2) Mustard 3) Rape
Found on
https://www.crosswordclues.com/clue/colza

1) Rape
Found on
https://www.crosswordclues.com/clue/colza

(Brassica) This is a group of plants belonging to the Mustard family, Cruciferae. It includes vegetables that are commonly grown and known as Broccoli, Brussels Sprouts, Cabbage, Cauliflower, Collards, Kale, Kohlrabi, Mustard, Rape, Rutabaga and Turnip. Many can be grown for their ornamental leaves.…
Found on
http://www.encyclo.co.uk/local/10004
Col'za noun [ French, from Dutch
koolzaad , prop., cabbage seed;
kool (akin to English
cole ) +
zaad , akin to English
seed .]
(Botany) A variety of cabbage (
Brassica oleracea ), cultivated for its seeds, which yield an oil valued for illuminating and ...
Found on
http://www.encyclo.co.uk/webster/C/113

rape, a plant of the mustard family, colorful yellow field crop grown throughout France, usu-ally pressed into vegetable (rapeseed) oil.
Found on
http://www.patriciawells.com/glossary/

type of oil, hence colza lamp.
Found on
http://www2.shu.ac.uk/sfca/glossary.cfm
No exact match found.