Tinned food? (4)
(Other definitions for baked beans that I've seen before include "Haricots in tomato sauce" , "food campers might have" , "veg too" , "Full English breakfast essential?" , "Tinned vegetables" .)
(Other definitions for tuna that I've seen before include "Marine food for your strange aunt" , "Type of fish" , "(Meat of) large fish" , "Skipjack --, blue-fin --" , "Warm-water food fish" .)