Possible Clues:

• I cry noisily for a sweet
• 'Two towers of sail at dawn of day / Are scarce long leagues apart, -' (A. H. Clough)
• You can have it cold for Sunday, by the sound of it
• Cold treat that can precede the last word of 18-, 23-, 40- or 50-Across
• I call out to the audience for something cold
• 22-Across and ___
• Sweet tops?
• Fumble, ultimately breaking fancy ceramic dish
• Sweet in bricks
• Diamonds? Pick 99 maybe