The dessert sounds good (3)
I believe the answer is:
pie
'the dessert' is the definition.
(pie is an example of a dessert)
'sounds good' is the wordplay.
'sounds' shows a homophone (sound like).
'good' becomes 'pi' (old-fashioned term for pious).
'pi' sounds like 'PIE'.
(Other definitions for pie that I've seen before include "Pastry product" , "Small, former coin of India" , "In the sky, this is wishful thinking" , "Cooked food" , "Dish baked in an oven, with pastry or mashed potato topping" .)