Possible Clues:

• Occasional butt from goat following girl
• Cry for today, and a hint to the starts of 17-, 25-, 37- and 54-Across
• All-day sucker?
• Springtime prank
• Dupe at the start of the second quarter?
• Girl, sweet gullible person
• One's caught on the first morning
• March out before you can be had like this
• Victim of practical joke at start of a month
• Prankster's cry