"The Jungle Book" wolf (5)
I believe the answer is:
akela
'the jungle book wolf' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for akela that I've seen before include "Jungle Book wolf (Kipling)" , "Cub Scouts adult leader" , "Leader of group" , "Adult leading cubs" , "pack-leader" .)