Related Clues:

• You can bet on it
• Narrow channel
• Shoreline indentation
• Pimlico entrant
• Harbor
• Rodeo mount
• Before play or opera
• Steed or stallion
• Bay or fjord
• Bayou or fjord, e.g.
• It could follow the first word of 17-, 24-, 50- and 61-Across
• Arm of the sea, e.g.
• Groom's responsibility
• Derby racer
• Tout's pick