Possible Clues:

• Ump's call, often based on a sequence found in the answers to starred clues
• First-time offense, so to speak
• Call after a swing and a miss
• Ump's call after a first pitch ... or a hint to the ends of 17-, 25-, 53- and 63-Across
• Start of a count
• Cry heard at home
• Result of some successful pitches
• Call from home?
• First of three to be put out
• Call at home