Related Clues:

• Smartphone's OS runner
• Do a farming job
• Papaya discard
• Pip — source — children
• Mainframe 'brain,' briefly
• Thing to sow
• Farmer's need
• Core of a tablet, briefly
• Acorn, for one
• Planter's need
• Computer's "brain"
• Bit in an apple core
• Apple chip?
• Cardinal snack
• Open placement