Possible Clues:

• Diner kitchen shout
• Diner call ... and what the answer to each starred clue literally contains
• Lunch counter cry
• Ask someone to provide, informally
• Diner cry after a bell is rung
• Summon for duty
• Officially request
• Request red for a change and pour out all round
• Cook's "Food's ready!"
• 'Waitress, your dish is ready!'