Sounds like a day for the ice-cream dish (6)
I believe the answer is:
sundae
'sounds like a day for the ice-cream dish' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for sundae that I've seen before include "Dish of ice-cream, fruit etc - sounds Sabbatical" , "'Ice cream topped with fruit, nuts and syrup (6)'" , "Ice cream served with a topping" , "Ice cream dessert" , "A lush ice-cream - sounds Sabbatical" .)