Usual intake for legislative assembly? (4)
I believe the answer is:
diet
I believe this clue is a double definition.
'usual intake' is the first definition.
(what someone eats)
'for legislative assembly?' is the second definition.
(diet is a kind of legislative assembly)
(Other definitions for diet that I've seen before include "Restriction of food intake" , "control weight" , "Restrict food-intake" , "Worms once a source of this" , "A restricted eating regime" .)