Lion's locks (4)
I believe the answer is:
mane
'lion's locks' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for mane that I've seen before include "Animal neck-hair" , "Long flowing hair" , "Lion or horse's 10 Across" , "Animal's neck hair" , "Name for hair on horse's neck" .)