As much as you eat in the time allowed (4)
I believe the answer is:
meal
'as much as you eat' is the definition.
I can't judge whether this definition defines the answer.
'in the time allowed' is the wordplay.
'in' indicates the answer is hidden within the clue.
'MEAL' is hidden in the letters of 'time allowed'.
Can you help me to learn more?
(Other definitions for meal that I've seen before include "Supper, e.g." , "Lunch or dinner, say" , "Lame (anag.)" , "dinner, maybe" , "Breakfast, lunch, supper" .)