Youthful affection (4,4)
I believe the answer is:
calf love
'youthful affection' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for calf love that I've seen before include "Adolescent infatuation" , "Immature amorous attachment" , "thing youngster may go through" , "Immature affection" , "youthful passion" .)