Related Clues:

• <--
• ___-timer
• Start of a long distance call
• See 40-Across
• Washington is on it
• It's heard before a liftoff
• 'A Chorus Line' number
• See 34-Down
• More than one
• See 52-Across
• Formula ___
• Time to return from lunch, perhaps
• Company number?
• 'Blastoff!' preceder
• It's inseparable