Caretaker of an apartment building (9)
I believe the answer is:
concierge
'caretaker of an apartment building' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for concierge that I've seen before include "Residential block porter" , "Hall porter" , "Caretaker's" , "hotel employee" , "Caretaker of an apartment building" .)