High point on New Year's Day for caretaker (7)
I believe the answer is:
janitor
'for caretaker' is the definition.
(I've seen this before)
'high point on new year's day' is the wordplay.
'high point' becomes 'tor' (a tor is a rocky hill).
'on' means one lot of letters go next to another.
'new year's day' becomes 'JANI' (resembles Jan 1st).
'tor' after 'jani' is 'JANITOR'.
(Other definitions for janitor that I've seen before include "Caretaker or doorkeeper" , "One employed to clean and maintain a building" , "Caretaker (mainly US)" , "Person looking after building" , "(In Scotland) school caretaker" .)