Dined or breakfasted (3)
I believe the answer is:
ate
This clue is a double definition.
'dined' is the first definition.
(I've seen this in another clue)
'breakfasted' is the second definition.
(I've seen this in another clue)
(Other definitions for ate that I've seen before include "Munched" , "mischief-maker" , "upset > Greek goddess" , "Ingested" , "Devoured" .)