The perfect order for dessert (5,3)
I believe the answer is:
apple pie
This could be a double definition.
'the perfect order' is the first definition.
'apple pie' can be an answer for 'order' (I have seen 'such order' mean 'apple pie' so perhaps 'order' could also mean 'apple pie'). I'm not sure about the 'the perfect' bit.
'dessert' is the second definition.
(I have seen 'Common dessert ' mean 'apple-pie' so perhaps 'dessert' could also mean 'apple-pie')
'for' acts as a link.
Can you help me to learn more?
(Other definitions for apple pie that I've seen before include "tarte Tatin, for example" , "Tasty pastry" , "(Characteristically American) sweet" , "an order that's perfect" , "Fruit dessert (with order suggesting perfection?)" .)