A young fox (3)
I believe the answer is:
kit
'a young fox' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for kit that I've seen before include "Set of articles or tools" , "Young stoat" , "Old song 'Pack up your troubles in your old . . . bag'" , "Equipment, clothing" , "Apparatus" .)