Lion's home (3)
I believe the answer is:
den
'lion'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's lair or man's study" , "Wild animal's lair" , "Animals' shelter" , "Gentleman's study or animal's lair" , "Room for work or play" .)