Foxy youngster? (3)
I believe the answer is:
cub
'youngster?' is the definition.
(I've seen this in other clues)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for cub that I've seen before include "Whelp" , "Baby animal, bear say" , "Youngster, trainee" , "A baby fox or bear" , "Novice" .)