Leafy green with a "dinosaur" variety (4)
I believe the answer is:
kale
'leafy green with a dinosaur variety' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for kale that I've seen before include "Type of cabbage" , "Hardy cabbage" , "Vegetable" , "Something green" , "Crinkle-leaf cabbage" .)