Boy raised on hotel food (4)
I believe the answer is:
nosh
'food' is the definition.
(nosh is a kind of food)
'boy raised on hotel' is the wordplay.
'boy' becomes 'son' (male child).
'raised' is a reversal indicator (going up in a down clue).
'on' says to put letters next to each other.
'hotel' becomes 'h' (phonetic alphabet).
'son' in reverse letter order is 'nos'.
'nos'+'h'='NOSH'
(Other definitions for nosh that I've seen before include "eating this?" , "Food (sl.)" , "Eats" , "chow" , "Food (Yiddish)" .)