After end of break, youngster returned for grilled food (5)
I believe the answer is:
kebab
'grilled food' is the definition.
(I've seen this before)
'after end of break youngster returned' is the wordplay.
'after' means one lot of letters go next to another.
'end of' says to take the final letters.
'youngster' becomes 'babe' (I've seen this before).
'returned' is a reversal indicator.
The final letter of 'break' is 'k'.
'babe' written backwards gives 'ebab'.
'k' next to 'ebab' is 'KEBAB'.
'for' acts as a link.
(Other definitions for kebab that I've seen before include "Meat and/or vegetables cooked on skewer" , "Pieces of meat, vegetables etc cooked on skewer" , "Meat grilled on skewer" , "Skewered meat dish" , "what one may spit" .)