The youth some girl adores (3)
I believe the answer is:
lad
'the youth' is the definition.
(I've seen this before)
'some girl adores' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'LAD' is hidden within 'girl adores'.
(Other definitions for lad that I've seen before include "Chap, fellow" , "Youngster" , "A young chap into ballads" , "Boy, young man" , "Stable employee" .)