Possible Clues:

• Sibling about to get upset stomach, mostly from vegetable
• 60 Across cousin
• Film producer's healthy cheer
• The most popular variety of this vegetable is calabrese
• Cubby --------, co-founder of the James Bond film franchise
• Cabbage family member
• Member of Greens trashed cool crib
• Brassica, some brown cabbage and cauliflower heads and cooking oil
• Little brother developed colic -- it's greens
• British firm backed about new-fangled oil as healthy food