Possible Clues:

• Heartless people returning fish and other food
• Edible seed, may be roasted and salted
• Item of fruit: just one of a miserly quantity?
• (Plant with) edible underground seed
• Eat pun for the hard fruit
• With 45-Across, sandwich spread
• Insignificant one
• Ante up for the popular snack
• Seed also known as a goober
• Leguminous seed eaten as snack or butter