Breakfast, lunch or dinner (4)
I believe the answer is:
meal
I believe this is a double definition.
'breakfast' is the first definition.
(thesaurus)
'lunch or dinner' is the second definition.
(I've seen this in another clue)
(Other definitions for meal that I've seen before include "Coarsely ground grain" , "Coarsely ground cereal seeds" , "Repast" , "Powdered grain for dinner say" , "Breakfast, dinner or supper" .)