Related Clues:

• Dark red salad ingredient
• Worker of abstemious habit keeping animal in plant
• Improve on way sound vegetable's produced
• Best way, say, to produce salad ingredient
• Vegetable tree cultivated in Wellington?
• Crop plant, sugar source
• Vegetable good in the middle, could be better outside
• Fancy beer? Too little time for one to get pickled
• Source of sugar
• Sugar-yielding root
• Purple vegetable
• Source of food in buffet, say
• Sugar-yielding plant
• Dark-red vegetable
• With 28 Across, overtly abashed