New Year's Day rise for caretaker (7)
I believe the answer is:
janitor
'for caretaker' is the definition.
(I've seen this before)
'new year's day rise' is the wordplay.
'new year's day' becomes 'JANI' (resembles Jan 1st).
'rise' becomes 'tor' (I've seen this before).
'jani'+'tor'='JANITOR'
(Other definitions for janitor that I've seen before include "Caretaker or doorkeeper" , "(In Scotland) school caretaker" , "One employed to clean and maintain a building" , "Person looking after building" , "Caretaker (mainly US)" .)