Place for thieves (3)
I believe the answer is:
den
'place for thieves' is the definition.
(as in a den of thieves)
This is the entire clue.
(Other definitions for den that I've seen before include "Animal's lair or man's study" , "Gentleman's study or animal's lair" , "Animal shelter" , "Habitation of wild animals (3)" , "Animals' shelter" .)