Meal as ordered by boy (5)
I believe the answer is:
salad
'meal' is the definition.
(I have seen 'Cold meal ' mean 'salad' so perhaps 'meal' could also mean 'salad')
'as ordered by boy' is the wordplay.
'ordered' indicates anagramming the letters.
'by' is a charade indicator (letters next to each other).
'boy' becomes 'lad' (informal term for boy).
'as' with letters rearranged gives 'sa'.
'sa'+'lad'='SALAD'
(Other definitions for salad that I've seen before include "Raw vegetable dish" , "Mainly raw cold dish" , "Cold dish of veg and herbs" , "Food dish" , "Raw, green, veg" .)