Wholemeal pasta cooked in the end for youngster (3)
I believe the answer is:
lad
'for youngster' is the definition.
(a young boy)
'wholemeal pasta cooked in the end' is the wordplay.
'in the end' suggests the final letters.
The last letters of 'wholemeal pasta cooked' are 'LAD'.
(Other definitions for lad that I've seen before include "Chap, fellow" , "Son" , "A young chap into ballads" , "Stable employee" , "(Housman's Shropshire) boy" .)