Related Clues:

• Start a tennis game
• Emulate a waiter
• Do some waiting
• Beatles film
• 911 request
• To no ___ (fruitlessly)
• Beatles song or movie
• Be of use to
• Try for an ace
• Start a point
• ''SOS!''
• It's sometimes called for
• Serve the purpose
• Hired hands
• Butler, maid, etc.