Brilliant late meal with no apple-core! (5)
I believe the answer is:
super
'brilliant' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for super that I've seen before include "Peachy" , "Exceptionally good" , "Top" , "Informally great, really up there" , "Wicked" .)