Record year with help having been set up (5)
I believe the answer is:
diary
'record' is the definition.
(I've seen this in another clue)
'year with help having been set up' is the wordplay.
'year' becomes 'yr' (abbreviation).
'with' is a charade indicator (letters next to each other).
'help' becomes 'aid' (synonyms).
'having been set up' says the letters should be written in reverse (in a down clue, letters go up).
'yr'+'aid'='yraid'
'yraid' in reverse letter order is 'DIARY'.
(Other definitions for diary that I've seen before include "personal account" , "Pepys' daily record" , "Daily record of personal activity" , "Personal record book" , "Appointment book" .)