Related Clues:

• Charge for a hand delivery?
• Front money?
• Initial payment
• Toss in a chip, say
• Pay to play 19 Across
• Start for date?
• Chamber starter
• Ratio involving a hypotenuse
• Front money
• You might get a hand for it
• Trigonometric term
• Poker-game starter
• Gin-game pot
• Pot part
• Deal prelude, often