Gatekeeper’s house (5)
I believe the answer is:
lodge
'gatekeeper's house' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for lodge that I've seen before include "Small gatehouse" , "Deposit in bank, or beaver's lair" , "Rat messing with this > animal home" , "Lair of beaver or otter" , "Become fixed; small house" .)