Breakfast drink? (5)
I believe the answer is:
toast
'breakfast' is the definition.
(toast is often eaten as breakfast)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for toast that I've seen before include "Cheers" , "Brown under a grill" , "Drink, cook" , "Raising of glasses" , "Drink the health of - brown bread!" .)