Health food for breakfast? (5)
I believe the answer is:
toast
This clue is a triple definition!
'health' is the first definition.
(I've seen this before)
'food' is the second definition.
(toast is a kind of food)
'for breakfast?' is the third definition.
(toast is often eaten as breakfast)
(Other definitions for toast that I've seen before include "Health-giving" , "Formally drink a health" , "meal component" , "Cook by radiant heat" , "Raise a glass to (someone)" .)