Possible Clues:

• Bean
• Plant of the pea or bean family
• Lentil or pea
• Bird, posh girl, served up mangetout for instance
• Paleolithic diet no-no
• Chickpea or soybean
• 'A peanut isn't a nut, it's a ___' (technically true but annoying thing to say)
• Vegetable to stick in shelter
• Vegetable of pea family
• Lentil or pea, e.g