Related Clues:

• Periodic function
• Dealer's call, perhaps
• Fork over, with "up"
• Deal precursor
• ___ mora (without delay, in Latin)
• Initial contribution of a sort
• Right triangle ratio
• First penny, perhaps
• Deserve a hand?
• Opening bet, in poker
• Requirement for a hand, say
• It might be a blue chip
• Pay to hold one's hand?
• Word in the a.m.?
• You'll get a hand for it