Bear cub's home (3)
I believe the answer is:
den
'bear cub's home' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for den that I've seen before include "Animal shelter" , "Wild animal's home" , "Gentleman's study or animal's lair" , "Miserable place" , "Animal lair or gent's study" .)