Obsessive stores new logs for a year (5)
I believe the answer is:
annal
'logs for a year' is the definition.
I can't tell whether this definition defines the answer.
'obsessive stores new' is the wordplay.
'obsessive' becomes 'anal' (anal can mean obsessed with order).
'stores' indicates putting letters inside.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'anal' going around 'n' is 'ANNAL'.
Can you help me to learn more?
(Other definitions for annal that I've seen before include "Year's entry in chronicle" , "Recorded event of one year" , "Record of a year's events" , "Yearly record" , "Recorded events of a year" .)